Model vs model
Claude Haiku 5.5 vs DeepSeek V4.1 Flash
Claude Haiku 5.5 and DeepSeek V4.1 Flash 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 DeepSeek V4.1 Flash page. Updated .
Short answer
Both are everyday models: each message comes from Pro's 60 a day, so they cost the same. Otherwise, only Claude Haiku 5.5 reads a PDF as the whole file. In our test runs, Claude Haiku 5.5 passed 45 of the 50 prompts both answered and DeepSeek V4.1 Flash 48; 5 prompts split them, most on summarization (3 to 5).
Claude Haiku 5.5 vs DeepSeek V4.1 Flash, prompt by prompt
Every prompt Claude Haiku 5.5 and DeepSeek V4.1 Flash 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 44, only Claude Haiku 5.5 passed 1, only DeepSeek V4.1 Flash passed 4, and neither passed 1. Claude Haiku 5.5 answered sooner on 7 of the 50 and DeepSeek V4.1 Flash on 41; the rest were within 10% of each other. The 50 replies cost $0.0118 on Claude Haiku 5.5 and $0.0260 on DeepSeek V4.1 Flash: 2.2× less on Claude Haiku 5.5.
The 5 prompts only one of Claude Haiku 5.5 and DeepSeek V4.1 Flash passed
Argue both sides of free buses (writing): DeepSeek V4.1 Flash 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. DeepSeek V4.1 Flash: Graded 4.3 of 5 on average (lowest 4).
An article in three bullets (summarization): DeepSeek V4.1 Flash 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. DeepSeek V4.1 Flash: Graded 4.7 of 5 on average (lowest 4).
An email thread in one sentence (summarization): DeepSeek V4.1 Flash 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. DeepSeek V4.1 Flash: Graded 4.7 of 5 on average (lowest 4).
A frustrated customer (customer support): DeepSeek V4.1 Flash passed and Claude Haiku 5.5 didn't. Claude Haiku 5.5: Graded 3.3 of 5 on average (lowest 3). DeepSeek V4.1 Flash: Graded 4.7 of 5 on average (lowest 4).
A message with a planted instruction (customer support): Claude Haiku 5.5 passed and DeepSeek V4.1 Flash didn't. Claude Haiku 5.5: Graded 4.7 of 5 on average (lowest 4). DeepSeek V4.1 Flash: Graded 4.7 of 5 on average (lowest 4); but 198 words, over the 150 allowed.
Job by job, the widest gaps first
Summarization: Claude Haiku 5.5 passed 3 of 5 and DeepSeek V4.1 Flash 5 of 5. DeepSeek V4.1 Flash answered 2.6× sooner at the median, 1.4 s against 0.5 s. DeepSeek V4.1 Flash cost 1.6× less, $0.0016 against $0.0010 for the 5 replies. Claude Haiku 5.5's replies ran 63% longer, in tokens of reply, thinking not counted.
Writing: Claude Haiku 5.5 passed 3 of 5 and DeepSeek V4.1 Flash 4 of 5. DeepSeek V4.1 Flash answered 1.1× sooner at the median, 1.5 s against 1.3 s. Claude Haiku 5.5 cost 2.8× less, $0.0008 against $0.0023 for the 5 replies. Claude Haiku 5.5's replies ran 46% longer, in tokens of reply, thinking not counted.
Coding: Claude Haiku 5.5 passed 5 of 5 and DeepSeek V4.1 Flash 5 of 5. DeepSeek V4.1 Flash answered 1.6× sooner at the median, 3.9 s against 2.5 s. Claude Haiku 5.5 cost 4.1× less, $0.0023 against $0.0092 for the 5 replies. Their replies ran to about the same length.
Translation: Claude Haiku 5.5 passed 5 of 5 and DeepSeek V4.1 Flash 5 of 5. Their median waits were close, 1.4 s against 1.3 s. Claude Haiku 5.5 cost 3.2× less, $0.0009 against $0.0029 for the 5 replies. Claude Haiku 5.5's replies ran 32% longer, in tokens of reply, thinking not counted.
Data analysis: Claude Haiku 5.5 passed 5 of 5 and DeepSeek V4.1 Flash 5 of 5. DeepSeek V4.1 Flash answered 3.8× sooner at the median, 3.3 s against 0.9 s. Claude Haiku 5.5 cost 2.4× less, $0.0018 against $0.0042 for the 5 replies. Claude Haiku 5.5's replies ran 21% longer, in tokens of reply, thinking not counted.
Customer support: Claude Haiku 5.5 passed 4 of 5 and DeepSeek V4.1 Flash 4 of 5. DeepSeek V4.1 Flash answered 1.5× sooner at the median, 1.9 s against 1.3 s. Claude Haiku 5.5 cost 2.0× less, $0.0012 against $0.0023 for the 5 replies. Claude Haiku 5.5's replies ran 15% longer, in tokens of reply, thinking not counted.
Math: Claude Haiku 5.5 passed 5 of 5 and DeepSeek V4.1 Flash 5 of 5. DeepSeek V4.1 Flash answered 1.9× sooner at the median, 1.7 s against 0.9 s. Claude Haiku 5.5 cost 1.7× less, $0.0007 against $0.0012 for the 5 replies. Claude Haiku 5.5's replies ran 93% longer, in tokens of reply, thinking not counted.
Agents and tool use: Claude Haiku 5.5 passed 5 of 5 and DeepSeek V4.1 Flash 5 of 5. DeepSeek V4.1 Flash answered 2.9× sooner at the median, 1.0 s against 0.4 s. Claude Haiku 5.5 cost 1.5× less, $0.0007 against $0.0010 for the 5 replies. Claude Haiku 5.5's replies ran 32% longer, in tokens of reply, thinking not counted.
RAG and answering from documents: Claude Haiku 5.5 passed 5 of 5 and DeepSeek V4.1 Flash 5 of 5. DeepSeek V4.1 Flash answered 3.2× sooner at the median, 1.1 s against 0.3 s. Claude Haiku 5.5 cost 1.2× less, $0.0007 against $0.0008 for the 5 replies. Their replies ran to about the same length.
SQL: Claude Haiku 5.5 passed 5 of 5 and DeepSeek V4.1 Flash 5 of 5. DeepSeek V4.1 Flash answered 3.1× sooner at the median, 1.3 s against 0.4 s. They cost about the same, $0.0011 against $0.0010 for the 5 replies. Claude Haiku 5.5's replies ran 88% 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 | DeepSeek V4.1 Flash, 1.1×took 1.5 s and 1.3 s | Claude Haiku 5.5, 3.0×cost $0.0001 and $0.0004 |
| Parse a duration like “1h 30m” | Both passed | DeepSeek V4.1 Flash, 2.2×took 5.4 s and 2.5 s | Claude Haiku 5.5, 2.2×cost $0.0005 and $0.0011 |
| Merge overlapping intervals | Both passed | DeepSeek V4.1 Flash, 2.1×took 1.3 s and 0.6 s | Claude Haiku 5.5, 2.0×cost $0.0002 and $0.0003 |
| Evaluate an arithmetic expression, no eval | Both passed | Claude Haiku 5.5, 1.5×took 3.9 s and 5.8 s | Claude Haiku 5.5, 4.8×cost $0.0006 and $0.0030 |
| Parse CSV with quoted fields | Both passed | Claude Haiku 5.5, 1.1×took 8.1 s and 9.1 s | Claude Haiku 5.5, 5.2×cost $0.0008 and $0.0042 |
| Announce a second bakery shop on LinkedIn | Both passed | DeepSeek V4.1 Flash, 2.6×took 3.4 s and 1.3 s | Claude Haiku 5.5, 2.3×cost $0.0002 and $0.0004 |
| Rewrite corporate jargon in plain words | Neither passed | DeepSeek V4.1 Flash, 1.5×took 1.3 s and 0.9 s | Claude Haiku 5.5, 2.4×cost $0.0001 and $0.0003 |
| Decline a meeting and offer two times | Both passed | Claude Haiku 5.5, 1.7×took 1.3 s and 2.2 s | Claude Haiku 5.5, 1.6×cost $0.0001 and $0.0002 |
| A product announcement with five rules | Both passed | DeepSeek V4.1 Flash, 1.9×took 1.5 s and 0.8 s | Claude Haiku 5.5, 2.2×cost $0.0001 and $0.0003 |
| Argue both sides of free buses | Only DeepSeek V4.1 Flash | DeepSeek V4.1 Flash, 1.3×took 3.3 s and 2.6 s | Claude Haiku 5.5, 4.2×cost $0.0003 and $0.0011 |
| A discount, then sales tax | Both passed | DeepSeek V4.1 Flash, 1.8×took 1.3 s and 0.7 s | Claude Haiku 5.5, 1.6×cost $0.0001 and $0.0001 |
| Pens at 3 for $4 | Both passed | DeepSeek V4.1 Flash, 1.9×took 1.7 s and 0.9 s | Claude Haiku 5.5, 2.5×cost $0.0002 and $0.0004 |
| Compound interest over three years | Both passed | Claude Haiku 5.5, 1.7×took 1.3 s and 2.1 s | Claude Haiku 5.5, 1.8×cost $0.0001 and $0.0002 |
| Four-digit numbers whose digits sum to 9 | Both passed | DeepSeek V4.1 Flash, 2.8×took 1.9 s and 0.7 s | Claude Haiku 5.5, 1.4×cost $0.0002 and $0.0003 |
| The highest of three dice is a 5 | Both passed | DeepSeek V4.1 Flash, 2.1×took 2.1 s and 1.0 s | Claude Haiku 5.5, 1.3×cost $0.0002 and $0.0002 |
| An article in three bullets | Only DeepSeek V4.1 Flash | DeepSeek V4.1 Flash, 13.6×took 7.2 s and 0.5 s | DeepSeek V4.1 Flash, 4.1×cost $0.0008 and $0.0002 |
| An email thread in one sentence | Only DeepSeek V4.1 Flash | DeepSeek V4.1 Flash, 2.6×took 1.1 s and 0.4 s | Closecost $0.0001 and $0.0001 |
| Decisions and action items from a meeting | Both passed | Claude Haiku 5.5, 1.8×took 1.3 s and 2.4 s | Claude Haiku 5.5, 1.2×cost $0.0002 and $0.0002 |
| A quarterly memo for the CEO | Both passed | DeepSeek V4.1 Flash, 9.6×took 4.2 s and 0.4 s | DeepSeek V4.1 Flash, 1.2×cost $0.0003 and $0.0003 |
| A study with a negative result | Both passed | DeepSeek V4.1 Flash, 2.6×took 1.4 s and 0.5 s | Claude Haiku 5.5, 1.4×cost $0.0001 and $0.0002 |
| The region with the most revenue | Both passed | DeepSeek V4.1 Flash, 4.4×took 3.4 s and 0.8 s | Claude Haiku 5.5, 1.9×cost $0.0003 and $0.0005 |
| Average order value in August | Both passed | DeepSeek V4.1 Flash, 1.5×took 1.3 s and 0.9 s | Claude Haiku 5.5, 2.2×cost $0.0002 and $0.0004 |
| Revenue change from July to August | Both passed | DeepSeek V4.1 Flash, 3.0×took 3.3 s and 1.1 s | Claude Haiku 5.5, 1.8×cost $0.0004 and $0.0007 |
| A median, filtered two ways | Both passed | DeepSeek V4.1 Flash, 4.2×took 2.6 s and 0.6 s | Claude Haiku 5.5, 1.5×cost $0.0002 and $0.0003 |
| Correlation between ad spend and sign-ups | Both passed | Closetook 5.7 s and 5.8 s | Claude Haiku 5.5, 3.2×cost $0.0007 and $0.0023 |
| A late order | Both passed | DeepSeek V4.1 Flash, 1.3×took 1.8 s and 1.3 s | Claude Haiku 5.5, 2.6×cost $0.0002 and $0.0005 |
| A return inside the window | Both passed | DeepSeek V4.1 Flash, 1.5×took 1.4 s and 0.9 s | Claude Haiku 5.5, 1.6×cost $0.0002 and $0.0003 |
| A frustrated customer | Only DeepSeek V4.1 Flash | DeepSeek V4.1 Flash, 1.7×took 2.1 s and 1.3 s | Claude Haiku 5.5, 2.2×cost $0.0002 and $0.0005 |
| A refund request outside the window | Both passed | DeepSeek V4.1 Flash, 1.8×took 1.9 s and 1.1 s | Claude Haiku 5.5, 1.5×cost $0.0002 and $0.0003 |
| A message with a planted instruction | Only Claude Haiku 5.5 | DeepSeek V4.1 Flash, 2.1×took 4.6 s and 2.3 s | Claude Haiku 5.5, 2.0×cost $0.0004 and $0.0008 |
| A delivery message into Spanish | Both passed | DeepSeek V4.1 Flash, 1.5×took 1.4 s and 0.9 s | Claude Haiku 5.5, 2.1×cost $0.0002 and $0.0003 |
| A product description into French | Both passed | Claude Haiku 5.5, 1.5×took 1.4 s and 2.1 s | Claude Haiku 5.5, 5.6×cost $0.0002 and $0.0009 |
| A meeting note into German | Both passed | Closetook 1.3 s and 1.3 s | Claude Haiku 5.5, 3.6×cost $0.0002 and $0.0005 |
| Idioms into natural Japanese | Both passed | DeepSeek V4.1 Flash, 1.1×took 2.0 s and 1.7 s | Claude Haiku 5.5, 3.6×cost $0.0002 and $0.0006 |
| A lease clause into Brazilian Portuguese | Both passed | DeepSeek V4.1 Flash, 2.2×took 2.3 s and 1.1 s | Claude Haiku 5.5, 2.0×cost $0.0003 and $0.0005 |
| Customers in one country | Both passed | DeepSeek V4.1 Flash, 3.8×took 1.0 s and 0.3 s | Closecost $0.0001 and $0.0001 |
| Count orders by status | Both passed | DeepSeek V4.1 Flash, 3.8×took 1.0 s and 0.3 s | DeepSeek V4.1 Flash, 1.8×cost $0.0001 and $0.0001 |
| Revenue by category | Both passed | DeepSeek V4.1 Flash, 3.1×took 1.3 s and 0.4 s | DeepSeek V4.1 Flash, 1.1×cost $0.0002 and $0.0002 |
| Every customer, even those without orders | Both passed | Claude Haiku 5.5, 1.5×took 1.3 s and 1.9 s | Claude Haiku 5.5, 2.0×cost $0.0002 and $0.0004 |
| Monthly revenue with a running total | Both passed | DeepSeek V4.1 Flash, 4.5×took 3.2 s and 0.7 s | DeepSeek V4.1 Flash, 1.7×cost $0.0005 and $0.0003 |
| A fact from one section | Both passed | DeepSeek V4.1 Flash, 3.4×took 1.0 s and 0.3 s | Claude Haiku 5.5, 1.2×cost $0.0001 and $0.0002 |
| Core hours and start times | Both passed | DeepSeek V4.1 Flash, 2.9×took 1.0 s and 0.3 s | Closecost $0.0001 and $0.0001 |
| Two sections in one answer | Both passed | DeepSeek V4.1 Flash, 4.3×took 1.4 s and 0.3 s | Closecost $0.0001 and $0.0001 |
| A later amendment changes the answer | Both passed | DeepSeek V4.1 Flash, 1.3×took 1.3 s and 1.0 s | Claude Haiku 5.5, 1.7×cost $0.0002 and $0.0003 |
| A question the handbook doesn't answer | Both passed | DeepSeek V4.1 Flash, 2.6×took 1.1 s and 0.4 s | Closecost $0.0001 and $0.0001 |
| Pick the tool and work out the date | Both passed | DeepSeek V4.1 Flash, 3.0×took 1.0 s and 0.3 s | Claude Haiku 5.5, 1.5×cost $0.0001 and $0.0001 |
| Convert a currency | Both passed | DeepSeek V4.1 Flash, 2.8×took 0.8 s and 0.3 s | Claude Haiku 5.5, 1.2×cost $0.0001 and $0.0001 |
| Book a meeting from a sentence | Both passed | DeepSeek V4.1 Flash, 4.6×took 3.0 s and 0.6 s | Claude Haiku 5.5, 1.6×cost $0.0002 and $0.0003 |
| Search, but don't book | Both passed | DeepSeek V4.1 Flash, 2.9×took 1.0 s and 0.4 s | Claude Haiku 5.5, 1.5×cost $0.0001 and $0.0002 |
| Two calls with a unit conversion | Both passed | DeepSeek V4.1 Flash, 3.6×took 2.3 s and 0.6 s | Claude Haiku 5.5, 1.5×cost $0.0002 and $0.0003 |
Claude Haiku 5.5 vs DeepSeek V4.1 Flash in our test runs
Claude Haiku 5.5 and DeepSeek V4.1 Flash 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 | DeepSeek V4.1 Flash |
|---|---|---|
| Coding | 5 of 5 | 5 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 | 5 of 5 |
| Customer support | 4 of 5 | 4 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 | 48 of 50 · 1 message each · $0.0005 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, summarization: both replies to a prompt only one of them passed.
An everyday prompt: “An article in three bullets”, in full.
Claude Haiku 5.5
Failed: Graded 3.7 of 5 on average (lowest 3); but 61 words, over the 60 allowed.
- Bike trips on Market Street rose from about 900 to 2,300 daily, while car traffic fell 14%, adding about a minute to rush-hour driver times. - Shop owners are divided: 27 of 60 surveyed saw more customers, 19 fewer. Cyclist injuries fell from nine to two. - Council votes in November; permanent lanes would cost €1.1 million on top of the €410,000 installation.
728 tokens in, 1,479 out (1,336 of them reasoning) · 7.2 s · $0.0008 · 1 message on Pro · answered by anthropic/claude-haiku-5.5 via Anthropic ·
DeepSeek V4.1 Flash
Passed: Graded 4.7 of 5 on average (lowest 4).
- Aldmoor's six-month protected bike lane trial on Market Street ended; council votes in November. - Bike trips rose from 900 to 2,300 daily; car traffic fell 14%, rush-hour delays rose ~1 minute; injuries fell from nine to two. - Businesses split on impact; installation cost €410,000, permanence a further €1.1 million.
562 tokens in, 92 out (11 of them reasoning) · 0.5 s · $0.0002 · 1 message on Pro · answered by deepseek/deepseek-v4.1-flash via Together ·
Claude Haiku 5.5 and DeepSeek V4.1 Flash 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 | DeepSeek V4.1 Flash |
|---|---|---|---|
| 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 | 60 a day |
| Max | $50 a month | 120 a day | 120 a day |
| Ultra | $100 a month | 200 a day | 200 a day |
| Studio | $200 a month | 200 a day | 200 a day |
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
Both are everyday models: each message comes from Pro's 60 a day, so they cost the same.
Context window
Claude Haiku 5.5 takes up to 1M tokens; DeepSeek V4.1 Flash up to 1.05M 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. DeepSeek V4.1 Flash gets a PDF's text rather than the file itself.
On Free
Both are in the free trial.
Where messages go
Claude Haiku 5.5: Sent to Anthropic directly. DeepSeek V4.1 Flash: Served through OpenRouter, only by hosts that don't store or train on prompts. The maker's own endpoint is never asked.
Fact by fact
| Fact | Claude Haiku 5.5 | DeepSeek V4.1 Flash |
|---|---|---|
| Context window | 1M tokens | 1.05M tokens |
| Reads images | Yes | Yes |
| PDFs | Whole file | Text only |
| Reasoning | Yes | Yes |
| API price (October 2026) | $0.10 in / $0.50 out per million tokens | $0.30 in / $1.20 out per million tokens |
| A typical message at API prices (4,000 tokens in, 700 out) | $0.0008 | $0.0020 |
| A $10 top-up adds | Nothing: an everyday model's count is daily | Nothing: an everyday model's count is daily |
| Where a message goes | Sent to Anthropic directly. | Served through OpenRouter, only by hosts that don't store or train on prompts. The maker's own endpoint is never asked. |
| 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. | When one host is down, OpenRouter moves the request to another host that meets the same rules. |
| Anthropic's safety fallback | Doesn't apply | Doesn't apply |
Claude Haiku 5.5 or DeepSeek V4.1 Flash?
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: it reads a PDF as the whole file, charts and scans included; it costs its maker less to run ($0.0008 a typical message at API prices), though in llmwise the count is the same.
Each model's page, the families, and other pairs
Claude Haiku 5.5 vs DeepSeek V4.1 Flash is one pair of models. The page below covers the whole families.
- Claude Haiku 5.5: price, limits and messages on every plan
- DeepSeek V4.1 Flash: price, limits and messages on every plan
- DeepSeek vs Claude
- Claude Haiku 5.5 vs GPT-6 Luna
- Claude Haiku 5.5 vs Claude Haiku 4.5
- Claude Sonnet 5.5 vs Claude Haiku 5.5
- Gemini 3.8 Flash vs DeepSeek V4.1 Flash
- GPT-6 Luna vs DeepSeek V4.1 Flash
- Claude Haiku 4.5 vs DeepSeek V4.1 Flash
- Every model-vs-model page
Claude Haiku 5.5 is a Claude model; DeepSeek V4.1 Flash is a DeepSeek model.
Questions
Is Claude Haiku 5.5 or DeepSeek V4.1 Flash cheaper in llmwise?
Both are everyday models: each message comes from Pro's 60 a day, so they cost the same. 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 DeepSeek V4.1 Flash for free?
Yes: both are in the free trial of 5 messages.
Which has the bigger context window, Claude Haiku 5.5 or DeepSeek V4.1 Flash?
DeepSeek V4.1 Flash: 1.05M tokens, against 1M 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 DeepSeek V4.1 Flash in the same chat?
Yes. Pick Claude Haiku 5.5 for one message and DeepSeek V4.1 Flash 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 DeepSeek V4.1 Flash?
On the same 50 prompts, run on October 8, 2026, Claude Haiku 5.5 passed 45 and DeepSeek V4.1 Flash passed 48. 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.