Model vs model
Claude Haiku 5.5 vs Claude Haiku 4.5
Claude Haiku 5.5 and Claude Haiku 4.5 are both in llmwise. What each gets on every plan, what it reads, how it's served and what happens when its provider fails, from the catalog and the code that runs them.
Model prices and specs checked against OpenRouter's Claude Haiku 5.5 page, OpenRouter's Claude Haiku 4.5 page. Updated .
Short answer
Claude Haiku 5.5 is an everyday model (60 messages a day on Pro); Claude Haiku 4.5 draws on the monthly allowance (up to 250 messages a month on Pro). Beyond that, they read the same files and neither is easier to try. In our test runs, Claude Haiku 5.5 passed 45 of the 50 prompts both answered and Claude Haiku 4.5 43; 10 prompts split them, most on coding (5 to 3).
Claude Haiku 5.5 vs Claude Haiku 4.5, prompt by prompt
Every prompt Claude Haiku 5.5 and Claude Haiku 4.5 both answered, compared directly, their biggest differences first. One run each, through OpenRouter: a wait depends on the provider and the load that day, so a lead under 10% counts as close.
Of the 50 prompts both answered, both passed 39, only Claude Haiku 5.5 passed 6, only Claude Haiku 4.5 passed 4, and neither passed 1. Claude Haiku 5.5 answered sooner on 28 of the 50 and Claude Haiku 4.5 on 14; the rest were within 10% of each other. The 50 replies cost $0.0118 on Claude Haiku 5.5 and $0.0741 on Claude Haiku 4.5: 6.3× less on Claude Haiku 5.5.
The 10 prompts only one of Claude Haiku 5.5 and Claude Haiku 4.5 passed
Evaluate an arithmetic expression, no eval (coding): Claude Haiku 5.5 passed and Claude Haiku 4.5 didn't. Claude Haiku 5.5: All 15 tests passed. Claude Haiku 4.5: 14 of 15 tests passed. First failure: evaluate("-2 ^ 2"): Expected values to be strictly deep-equal:
Parse CSV with quoted fields (coding): Claude Haiku 5.5 passed and Claude Haiku 4.5 didn't. Claude Haiku 5.5: All 8 tests passed. Claude Haiku 4.5: 5 of 8 tests passed. First failure: parseCsv('"line1\nline2",end\r\nnext,row\r\n'): Expected values to be strictly deep-equal:
Rewrite corporate jargon in plain words (writing): Claude Haiku 4.5 passed and Claude Haiku 5.5 didn't. Claude Haiku 5.5: Graded 3.3 of 5 on average (lowest 2). Claude Haiku 4.5: Graded 4.3 of 5 on average (lowest 4).
A product announcement with five rules (writing): Claude Haiku 5.5 passed and Claude Haiku 4.5 didn't. Claude Haiku 5.5: Graded 4.3 of 5 on average (lowest 4). Claude Haiku 4.5: Graded 3.7 of 5 on average (lowest 3).
Argue both sides of free buses (writing): Claude Haiku 4.5 passed and Claude Haiku 5.5 didn't. Claude Haiku 5.5: Graded 4.0 of 5 on average (lowest 4); but a paragraph of 103 words, over the 90 allowed. Claude Haiku 4.5: Graded 4.0 of 5 on average (lowest 4).
An article in three bullets (summarization): Claude Haiku 4.5 passed and Claude Haiku 5.5 didn't. Claude Haiku 5.5: Graded 3.7 of 5 on average (lowest 3); but 61 words, over the 60 allowed. Claude Haiku 4.5: Graded 4.0 of 5 on average (lowest 3).
An email thread in one sentence (summarization): Claude Haiku 4.5 passed and Claude Haiku 5.5 didn't. Claude Haiku 5.5: Graded 4.3 of 5 on average (lowest 4); but 39 words, over the 30 allowed. Claude Haiku 4.5: Graded 4.7 of 5 on average (lowest 4).
Average order value in August (data analysis): Claude Haiku 5.5 passed and Claude Haiku 4.5 didn't. Claude Haiku 5.5: Final answer 300.00: right. Claude Haiku 4.5: Final answer 275.00; expected 300.
Correlation between ad spend and sign-ups (data analysis): Claude Haiku 5.5 passed and Claude Haiku 4.5 didn't. Claude Haiku 5.5: Final answer 0.97: right. Claude Haiku 4.5: Final answer 0.99; expected 0.97.
A message with a planted instruction (customer support): Claude Haiku 5.5 passed and Claude Haiku 4.5 didn't. Claude Haiku 5.5: Graded 4.7 of 5 on average (lowest 4). Claude Haiku 4.5: Graded 4.3 of 5 on average (lowest 3); but 165 words, over the 150 allowed.
Job by job, the widest gaps first
Data analysis: Claude Haiku 5.5 passed 5 of 5 and Claude Haiku 4.5 3 of 5. Claude Haiku 4.5 answered 1.2× sooner at the median, 3.3 s against 2.7 s. Claude Haiku 5.5 cost 7.0× less, $0.0018 against $0.0125 for the 5 replies. Claude Haiku 4.5's replies ran 96% longer, in tokens of reply, thinking not counted.
Coding: Claude Haiku 5.5 passed 5 of 5 and Claude Haiku 4.5 3 of 5. Claude Haiku 4.5 answered 1.7× sooner at the median, 3.9 s against 2.3 s. Claude Haiku 5.5 cost 6.1× less, $0.0023 against $0.0137 for the 5 replies. Their replies ran to about the same length.
Summarization: Claude Haiku 5.5 passed 3 of 5 and Claude Haiku 4.5 5 of 5. Claude Haiku 5.5 answered 1.2× sooner at the median, 1.4 s against 1.7 s. Claude Haiku 5.5 cost 3.2× less, $0.0016 against $0.0051 for the 5 replies. Claude Haiku 5.5's replies ran 54% longer, in tokens of reply, thinking not counted.
Writing: Claude Haiku 5.5 passed 3 of 5 and Claude Haiku 4.5 4 of 5. Claude Haiku 5.5 answered 1.5× sooner at the median, 1.5 s against 2.2 s. Claude Haiku 5.5 cost 7.1× less, $0.0008 against $0.0057 for the 5 replies. Claude Haiku 5.5's replies ran 46% longer, in tokens of reply, thinking not counted.
Customer support: Claude Haiku 5.5 passed 4 of 5 and Claude Haiku 4.5 3 of 5. Claude Haiku 5.5 answered 1.4× sooner at the median, 1.9 s against 2.7 s. Claude Haiku 5.5 cost 6.4× less, $0.0012 against $0.0073 for the 5 replies. Claude Haiku 5.5's replies ran 20% longer, in tokens of reply, thinking not counted.
Math: Claude Haiku 5.5 passed 5 of 5 and Claude Haiku 4.5 5 of 5. Claude Haiku 5.5 answered 1.3× sooner at the median, 1.7 s against 2.2 s. Claude Haiku 5.5 cost 10.5× less, $0.0007 against $0.0077 for the 5 replies. Claude Haiku 4.5's replies ran 30% longer, in tokens of reply, thinking not counted.
Translation: Claude Haiku 5.5 passed 5 of 5 and Claude Haiku 4.5 5 of 5. Claude Haiku 5.5 answered 1.3× sooner at the median, 1.4 s against 1.8 s. Claude Haiku 5.5 cost 8.2× less, $0.0009 against $0.0074 for the 5 replies. Their replies ran to about the same length.
RAG and answering from documents: Claude Haiku 5.5 passed 5 of 5 and Claude Haiku 4.5 5 of 5. Claude Haiku 5.5 answered 1.1× sooner at the median, 1.1 s against 1.2 s. Claude Haiku 5.5 cost 7.1× less, $0.0007 against $0.0050 for the 5 replies. Their replies ran to about the same length.
Agents and tool use: Claude Haiku 5.5 passed 5 of 5 and Claude Haiku 4.5 5 of 5. Their median waits were close, 1.0 s against 1.1 s. Claude Haiku 5.5 cost 6.9× less, $0.0007 against $0.0047 for the 5 replies. Claude Haiku 4.5's replies ran 26% longer, in tokens of reply, thinking not counted.
SQL: Claude Haiku 5.5 passed 5 of 5 and Claude Haiku 4.5 5 of 5. Their median waits were close, 1.3 s against 1.2 s. Claude Haiku 5.5 cost 4.5× less, $0.0011 against $0.0049 for the 5 replies. Claude Haiku 5.5's replies ran 52% longer, in tokens of reply, thinking not counted.
All 50 prompts: who passed, who answered sooner, who cost less
| Prompt | Result | Sooner | Cheaper |
|---|---|---|---|
| Turn a title into a URL slug | Both passed | Closetook 1.5 s and 1.5 s | Claude Haiku 5.5, 6.9×cost $0.0001 and $0.0010 |
| Parse a duration like “1h 30m” | Both passed | Claude Haiku 4.5, 2.3×took 5.4 s and 2.3 s | Claude Haiku 5.5, 4.2×cost $0.0005 and $0.0022 |
| Merge overlapping intervals | Both passed | Claude Haiku 5.5, 1.5×took 1.3 s and 2.0 s | Claude Haiku 5.5, 9.9×cost $0.0002 and $0.0017 |
| Evaluate an arithmetic expression, no eval | Only Claude Haiku 5.5 | Claude Haiku 5.5, 1.9×took 3.9 s and 7.6 s | Claude Haiku 5.5, 8.9×cost $0.0006 and $0.0056 |
| Parse CSV with quoted fields | Only Claude Haiku 5.5 | Claude Haiku 4.5, 2.3×took 8.1 s and 3.5 s | Claude Haiku 5.5, 4.1×cost $0.0008 and $0.0033 |
| Announce a second bakery shop on LinkedIn | Both passed | Claude Haiku 4.5, 1.3×took 3.4 s and 2.6 s | Claude Haiku 5.5, 7.9×cost $0.0002 and $0.0013 |
| Rewrite corporate jargon in plain words | Only Claude Haiku 4.5 | Claude Haiku 5.5, 1.3×took 1.3 s and 1.6 s | Claude Haiku 5.5, 6.8×cost $0.0001 and $0.0008 |
| Decline a meeting and offer two times | Both passed | Claude Haiku 5.5, 1.5×took 1.3 s and 2.0 s | Claude Haiku 5.5, 7.2×cost $0.0001 and $0.0010 |
| A product announcement with five rules | Only Claude Haiku 5.5 | Claude Haiku 5.5, 1.5×took 1.5 s and 2.2 s | Claude Haiku 5.5, 9.5×cost $0.0001 and $0.0012 |
| Argue both sides of free buses | Only Claude Haiku 4.5 | Closetook 3.3 s and 3.4 s | Claude Haiku 5.5, 5.4×cost $0.0003 and $0.0014 |
| A discount, then sales tax | Both passed | Claude Haiku 4.5, 1.1×took 1.3 s and 1.1 s | Claude Haiku 5.5, 8.8×cost $0.0001 and $0.0007 |
| Pens at 3 for $4 | Both passed | Claude Haiku 5.5, 1.2×took 1.7 s and 2.2 s | Claude Haiku 5.5, 8.9×cost $0.0002 and $0.0014 |
| Compound interest over three years | Both passed | Claude Haiku 5.5, 2.8×took 1.3 s and 3.5 s | Claude Haiku 5.5, 12.2×cost $0.0001 and $0.0013 |
| Four-digit numbers whose digits sum to 9 | Both passed | Claude Haiku 5.5, 1.5×took 1.9 s and 2.9 s | Claude Haiku 5.5, 11.9×cost $0.0002 and $0.0024 |
| The highest of three dice is a 5 | Both passed | Closetook 2.1 s and 2.2 s | Claude Haiku 5.5, 10.1×cost $0.0002 and $0.0018 |
| An article in three bullets | Only Claude Haiku 4.5 | Claude Haiku 4.5, 4.0×took 7.2 s and 1.8 s | Claude Haiku 5.5, 1.3×cost $0.0008 and $0.0011 |
| An email thread in one sentence | Only Claude Haiku 4.5 | Claude Haiku 5.5, 1.2×took 1.1 s and 1.3 s | Claude Haiku 5.5, 6.1×cost $0.0001 and $0.0007 |
| Decisions and action items from a meeting | Both passed | Claude Haiku 5.5, 1.2×took 1.3 s and 1.7 s | Claude Haiku 5.5, 5.9×cost $0.0002 and $0.0011 |
| A quarterly memo for the CEO | Both passed | Claude Haiku 4.5, 2.7×took 4.2 s and 1.5 s | Claude Haiku 5.5, 3.7×cost $0.0003 and $0.0012 |
| A study with a negative result | Both passed | Claude Haiku 5.5, 2.5×took 1.4 s and 3.4 s | Claude Haiku 5.5, 6.9×cost $0.0001 and $0.0010 |
| The region with the most revenue | Both passed | Claude Haiku 4.5, 1.2×took 3.4 s and 2.7 s | Claude Haiku 5.5, 9.8×cost $0.0003 and $0.0026 |
| Average order value in August | Only Claude Haiku 5.5 | Claude Haiku 5.5, 1.6×took 1.3 s and 2.1 s | Claude Haiku 5.5, 11.3×cost $0.0002 and $0.0023 |
| Revenue change from July to August | Both passed | Claude Haiku 5.5, 1.3×took 3.3 s and 4.2 s | Claude Haiku 5.5, 5.7×cost $0.0004 and $0.0022 |
| A median, filtered two ways | Both passed | Claude Haiku 4.5, 1.3×took 2.6 s and 2.0 s | Claude Haiku 5.5, 7.9×cost $0.0002 and $0.0016 |
| Correlation between ad spend and sign-ups | Only Claude Haiku 5.5 | Claude Haiku 4.5, 1.1×took 5.7 s and 5.0 s | Claude Haiku 5.5, 5.1×cost $0.0007 and $0.0037 |
| A late order | Both passed | Claude Haiku 5.5, 1.1×took 1.8 s and 2.0 s | Claude Haiku 5.5, 7.2×cost $0.0002 and $0.0014 |
| A return inside the window | Both passed | Claude Haiku 5.5, 1.7×took 1.4 s and 2.4 s | Claude Haiku 5.5, 7.9×cost $0.0002 and $0.0013 |
| A frustrated customer | Neither passed | Claude Haiku 5.5, 1.4×took 2.1 s and 3.0 s | Claude Haiku 5.5, 7.5×cost $0.0002 and $0.0016 |
| A refund request outside the window | Both passed | Claude Haiku 5.5, 1.4×took 1.9 s and 2.7 s | Claude Haiku 5.5, 6.3×cost $0.0002 and $0.0013 |
| A message with a planted instruction | Only Claude Haiku 5.5 | Claude Haiku 4.5, 1.5×took 4.6 s and 3.2 s | Claude Haiku 5.5, 4.7×cost $0.0004 and $0.0018 |
| A delivery message into Spanish | Both passed | Claude Haiku 5.5, 1.1×took 1.4 s and 1.5 s | Claude Haiku 5.5, 7.1×cost $0.0002 and $0.0011 |
| A product description into French | Both passed | Closetook 1.4 s and 1.4 s | Claude Haiku 5.5, 7.0×cost $0.0002 and $0.0011 |
| A meeting note into German | Both passed | Claude Haiku 5.5, 1.4×took 1.3 s and 1.8 s | Claude Haiku 5.5, 6.7×cost $0.0002 and $0.0010 |
| Idioms into natural Japanese | Both passed | Claude Haiku 5.5, 1.7×took 2.0 s and 3.3 s | Claude Haiku 5.5, 11.2×cost $0.0002 and $0.0019 |
| A lease clause into Brazilian Portuguese | Both passed | Claude Haiku 5.5, 1.5×took 2.3 s and 3.5 s | Claude Haiku 5.5, 8.5×cost $0.0003 and $0.0022 |
| Customers in one country | Both passed | Claude Haiku 5.5, 1.1×took 1.0 s and 1.1 s | Claude Haiku 5.5, 5.5×cost $0.0001 and $0.0007 |
| Count orders by status | Both passed | Claude Haiku 4.5, 1.2×took 1.0 s and 0.8 s | Claude Haiku 5.5, 5.2×cost $0.0001 and $0.0006 |
| Revenue by category | Both passed | Closetook 1.3 s and 1.2 s | Claude Haiku 5.5, 6.1×cost $0.0002 and $0.0011 |
| Every customer, even those without orders | Both passed | Claude Haiku 5.5, 1.7×took 1.3 s and 2.1 s | Claude Haiku 5.5, 5.5×cost $0.0002 and $0.0010 |
| Monthly revenue with a running total | Both passed | Claude Haiku 4.5, 2.0×took 3.2 s and 1.6 s | Claude Haiku 5.5, 3.1×cost $0.0005 and $0.0016 |
| A fact from one section | Both passed | Closetook 1.0 s and 1.1 s | Claude Haiku 5.5, 6.8×cost $0.0001 and $0.0009 |
| Core hours and start times | Both passed | Claude Haiku 5.5, 1.2×took 1.0 s and 1.1 s | Claude Haiku 5.5, 7.1×cost $0.0001 and $0.0009 |
| Two sections in one answer | Both passed | Closetook 1.4 s and 1.3 s | Claude Haiku 5.5, 7.7×cost $0.0001 and $0.0011 |
| A later amendment changes the answer | Both passed | Claude Haiku 5.5, 1.5×took 1.3 s and 1.9 s | Claude Haiku 5.5, 7.5×cost $0.0002 and $0.0012 |
| A question the handbook doesn't answer | Both passed | Claude Haiku 5.5, 1.1×took 1.1 s and 1.2 s | Claude Haiku 5.5, 6.5×cost $0.0001 and $0.0009 |
| Pick the tool and work out the date | Both passed | Closetook 1.0 s and 1.1 s | Claude Haiku 5.5, 8.1×cost $0.0001 and $0.0008 |
| Convert a currency | Both passed | Claude Haiku 5.5, 1.3×took 0.8 s and 1.0 s | Claude Haiku 5.5, 8.1×cost $0.0001 and $0.0008 |
| Book a meeting from a sentence | Both passed | Claude Haiku 4.5, 2.4×took 3.0 s and 1.2 s | Claude Haiku 5.5, 5.4×cost $0.0002 and $0.0010 |
| Search, but don't book | Both passed | Claude Haiku 5.5, 1.1×took 1.0 s and 1.1 s | Claude Haiku 5.5, 8.2×cost $0.0001 and $0.0010 |
| Two calls with a unit conversion | Both passed | Claude Haiku 4.5, 1.8×took 2.3 s and 1.2 s | Claude Haiku 5.5, 6.2×cost $0.0002 and $0.0011 |
Claude Haiku 5.5 vs Claude Haiku 4.5 in our test runs
Claude Haiku 5.5 and Claude Haiku 4.5 on the same prompts, job by job: how many replies passed their check.
Based on 100 of our test runs on , through OpenRouter with the app's own prompt and settings. Updated .
| Job | Claude Haiku 5.5 | Claude Haiku 4.5 |
|---|---|---|
| Coding | 5 of 5 | 3 of 5 |
| Writing | 3 of 5 | 4 of 5 |
| Math | 5 of 5 | 5 of 5 |
| Summarization | 3 of 5 | 5 of 5 |
| Data analysis | 5 of 5 | 3 of 5 |
| Customer support | 4 of 5 | 3 of 5 |
| Translation | 5 of 5 | 5 of 5 |
| SQL | 5 of 5 | 5 of 5 |
| RAG and answering from documents | 5 of 5 | 5 of 5 |
| Agents and tool use | 5 of 5 | 5 of 5 |
| All jobs | 45 of 50 · 1 message each · $0.0002 a reply | 43 of 50 · 1 message each · $0.0015 a reply |
The same prompts, sent to both through llmwise's own pipeline and checked the same way: five for each job. A bold count is the one that passed more. Messages: what each reply counted as on Pro. Cost: what OpenRouter charged us per reply, on average. Every prompt, and how it's scored.
Where they differed most, coding: both replies to a prompt only one of them passed.
A hard prompt: “Evaluate an arithmetic expression, no eval”, in full.
Claude Haiku 5.5
Passed: All 15 tests passed.
```javascript function evaluate(expression) { const s = String(expression); const tokens = []; let i = 0; while (i < s.length) { const c = s[i]; if (c === ' ' || c === '\t' || c === '\n' || c === '\r') { i++; continue; } if ((c >= '0' && c <= '9') || c === '.') { let j = i; while (j < s.length && ((s[j] >= '0' && s[j] <= '9') || s[j] === '.')) j++; const text = s.slice(i, j); if (!/^(\d+\.?\d*|\.\d+)$/.test(text)) throw new Error(`Invalid number "${text}"`); tokens.push({ type: 'num', value: Number(text) }); i = j; continue; } if ('+-*/^()'.includes(c)) { tokens.push({ type: c }); i++; continue; } throw new Error(`Unexpected character "${c}"`); } let pos = 0; const peek = () => tokens[pos] ? tokens[pos].type : null; const next = () => tokens[pos++]; // expr := term (('+'|'-') term)* function parseExpr() { let value = parseTerm(); while (peek() === '+' || peek() === '-') { const op = next().type; const rhs = parseTerm(); value = op === '+' ? value + rhs : value - rhs; } return value; } // term := unary (('*'|'/') unary)* function parseTerm() { let value = parseUnary(); while (peek() === '*' || peek() === '/') { const op = next().type; const rhs = parseUnary(); value = op === '*' ? value * rhs : value / rhs; } return value; } // unary := '-' unary | power function parseUnary() { if (peek() === '-') { next(); return -parseUnary(); } return parsePower(); } // power := primary ('^' unary)? (right-associative; exponent may be signed) function parsePower() { const base = parsePrimary(); if (peek() === '^') { next(); const exp = parseUnary(); return Math.pow(base, exp); } return base; } // primary := number | '(' expr ')' function parsePrimary() { const t = tokens[pos]; if (!t) throw new Error('Unexpected end of expression'); if (t.type === 'num') { pos++; return t.value; } if (t.type === '(') { pos++; const value = parseExpr(); if (peek() !== ')') throw new Error('Expected ")"'); pos++; return value; } throw new Error(`Unexpected token "${t.type}"`); } if (tokens.length === 0) throw new Error('Empty expression'); const result = parseExpr(); if (pos !== tokens.length) throw new Error(`Unexpected token "${tokens[pos].type}"`); return result; } ```763 tokens in, 1,074 out · 3.9 s · $0.0006 · 1 message on Pro · answered by anthropic/claude-haiku-5.5 via Anthropic ·
Claude Haiku 4.5
Failed: 14 of 15 tests passed. First failure: evaluate("-2 ^ 2"): Expected values to be strictly deep-equal:
```javascript function evaluate(expression) { const tokens = tokenize(expression); const parser = new Parser(tokens); const result = parser.parseExpression(); if (parser.pos !== tokens.length) { throw new Error("Unexpected tokens after expression"); } return result; } function tokenize(expression) { const tokens = []; let i = 0; while (i < expression.length) { const ch = expression[i]; if (/\s/.test(ch)) { i++; continue; } if (/\d/.test(ch)) { let num = ''; while (i < expression.length && /[\d.]/.test(expression[i])) { num += expression[i]; i++; } const parsed = parseFloat(num); if (isNaN(parsed)) { throw new Error(`Invalid number: ${num}`); } tokens.push({ type: 'NUMBER', value: parsed }); continue; } if ('+-*/^()'.includes(ch)) { tokens.push({ type: ch, value: ch }); i++; continue; } throw new Error(`Unexpected character: ${ch}`); } return tokens; } class Parser { constructor(tokens) { this.tokens = tokens; this.pos = 0; } peek() { return this.tokens[this.pos]; } consume() { return this.tokens[this.pos++]; } parseExpression() { return this.parseAddSub(); } parseAddSub() { let left = this.parseMulDiv(); while (this.peek() && (this.peek().type === '+' || this.peek().type === '-')) { const op = this.consume().type; const right = this.parseMulDiv(); left = op === '+' ? left + right : left - right; } return left; } parseMulDiv() { let left = this.parsePower(); while (this.peek() && (this.peek().type === '*' || this.peek().type === '/')) { const op = this.consume().type; const right = this.parsePower(); left = op === '*' ? left * right : left / right; } return left; } parsePower() { let left = this.parseUnary(); if (this.peek() && this.peek().type === '^') { this.consume(); const right = this.parsePower(); left = Math.pow(left, right); } return left; } parseUnary() { if (this.peek() && this.peek().type === '-') { this.consume(); return -this.parseUnary(); } if (this.peek() && this.peek().type === '+') { this.consume(); return this.parseUnary(); } return this.parsePrimary(); } parsePrimary() { const token = this.peek(); if (!token) { throw new Error("Unexpected end of expression"); } if (token.type === 'NUMBER') { this.consume(); return token.value; } if (token.type === '(') { this.consume(); const result = this.parseExpression(); if (!this.peek() || this.peek().type !== ')') { throw new Error("Missing closing parenthesis"); } this.consume(); return result; } throw new Error(`Unexpected token: ${token.value}`); } } ```599 tokens in, 1,007 out · 7.6 s · $0.0056 · 1 message on Pro · answered by anthropic/claude-haiku-4.5 via Amazon Bedrock ·
Claude Haiku 5.5 and Claude Haiku 4.5 on every plan
Whether the one-time free trial reaches each model, then each paid plan's messages on it.
| Plan | Price | Claude Haiku 5.5 | Claude Haiku 4.5 |
|---|---|---|---|
| Free | $0 | In the one-time trial of 5 messages | In the one-time trial of 5 messages |
| Pro | $20 a month | 60 a day | Up to 250 a month |
| Max | $50 a month | 120 a day | Up to 800 a month |
| Ultra | $100 a month | 200 a day | Up to 1,800 a month |
| Studio | $200 a month | 200 a day | Up to 4,000 a month |
Prices don't include tax, which is added where it applies and shown before you pay. A paid plan's month is one allowance shared by every model, so each monthly count is the most you get if all of it goes to that model. It renews each billing period; everyday models refill daily at 00:00 UTC. Long chats count more per reply. How pricing works.
Every limit is published. Paid plans also have a monthly fair-use limit on AI cost: Pro $7.50, Max $20, Ultra $42, Studio $85. Using every message on your plan at typical sizes stays under it; very large messages and heavy research use it faster. Every limit, explained.
What differs
Messages on Pro
Claude Haiku 5.5 is an everyday model (60 messages a day on Pro); Claude Haiku 4.5 draws on the monthly allowance (up to 250 messages a month on Pro).
Context window
Claude Haiku 5.5 takes up to 1M tokens; Claude Haiku 4.5 up to 200K tokens. A chat in llmwise holds up to 200k tokens, which fits in either, so the difference shows only through each maker's own API.
Images and PDFs
Both read images. Both take a PDF as the whole file, pages and all.
On Free
Both are in the free trial.
Where messages go
Both are Claude models, served the same way. Sent to Anthropic directly.
Fact by fact
| Fact | Claude Haiku 5.5 | Claude Haiku 4.5 |
|---|---|---|
| Context window | 1M tokens | 200K tokens |
| Reads images | Yes | Yes |
| PDFs | Whole file | Whole file |
| Reasoning | Yes | No |
| API price (October 2026) | $0.10 in / $0.50 out per million tokens | $1.00 in / $5.00 out per million tokens |
| A typical message at API prices (4,000 tokens in, 700 out) | $0.0008 | $0.0075 |
| A $10 top-up adds | Nothing: an everyday model's count is daily | 200 messages |
| Where a message goes | Sent to Anthropic directly. | Sent to Anthropic directly. |
| If the provider fails | If Anthropic fails before the reply starts (an overload, a server error, a dropped connection), llmwise sends the same request to Claude Haiku 5.5 through OpenRouter instead. | If Anthropic fails before the reply starts (an overload, a server error, a dropped connection), llmwise sends the same request to Claude Haiku 4.5 through OpenRouter instead. |
| Anthropic's safety fallback | Doesn't apply | Doesn't apply |
Claude Haiku 5.5 or Claude Haiku 4.5?
From the facts above and our test runs: the rest is how their answers suit your work, which one chat can show you.
Pick Claude Haiku 5.5: its messages come from the daily count (60 messages a day on Pro), so they leave the monthly allowance for bigger models.
Each model's page, the families, and other pairs
Claude Haiku 5.5 vs Claude Haiku 4.5 is one pair of models. The page below covers the whole family.
- Claude Haiku 5.5: price, limits and messages on every plan
- Claude Haiku 4.5: price, limits and messages on every plan
- Claude playground: try Claude online
- Claude Haiku 5.5 vs GPT-6 Luna
- Claude Sonnet 5.5 vs Claude Haiku 5.5
- Claude Haiku 5.5 vs GLM 5.3 Flash
- Claude Fable 5.1 vs Claude Haiku 4.5
- Claude Opus 5.5 vs Claude Haiku 4.5
- Claude Sonnet 5 vs Claude Haiku 4.5
- Every model-vs-model page
Both are made by the same company, so they're served the same way.
Questions
Is Claude Haiku 5.5 or Claude Haiku 4.5 cheaper in llmwise?
Claude Haiku 5.5 is an everyday model (60 messages a day on Pro); Claude Haiku 4.5 draws on the monthly allowance (up to 250 messages a month on Pro). Every paid plan's monthly allowance is shared by all models, so each count is the most you get if it all goes to that model.
Can I try Claude Haiku 5.5 and Claude Haiku 4.5 for free?
Yes: both are in the free trial of 5 messages.
Which has the bigger context window, Claude Haiku 5.5 or Claude Haiku 4.5?
Claude Haiku 5.5: 1M tokens, against 200K tokens. A chat in llmwise holds up to 200k tokens, which fits in either, so the difference shows only through each maker's own API.
Can I use Claude Haiku 5.5 and Claude Haiku 4.5 in the same chat?
Yes. Pick Claude Haiku 5.5 for one message and Claude Haiku 4.5 for the next; the second sees the whole chat, including the first one's answer.
Which did better in your test runs, Claude Haiku 5.5 or Claude Haiku 4.5?
On the same 50 prompts, run on October 7, 2026, Claude Haiku 5.5 passed 45 and Claude Haiku 4.5 passed 43. The table on this page has each job, and every reply is published.
Claude, GPT, Gemini, DeepSeek, Grok, Kimi, and GLM, in one chat.
See what a message costs before you send it. Free is 5 messages to try; sign in with an email link, no password or card.