Claude vs ChatGPT for data analysis

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Data analysis: Claude Haiku 5.5 passed 5 of 5 and GPT-6 Luna 5 of 5. GPT-6 Luna answered 1.3× sooner at the median, 3.3 s against 2.5 s. GPT-6 Luna cost 2.0× less, $0.0018 against $0.0009 for the 5 replies. Claude Haiku 5.5's replies ran 157% longer, in tokens of reply, thinking not counted.

1. 1. The region with the most revenue

   Everyday. Claude: 6 of 6 models passed, Claude Haiku 5.5 the cheapest at $0.0003 · GPT: 4 of 4 models passed, GPT-6 Luna the cheapest at $0.0001. The prompt in full.

   Claude Haiku 5.5 and GPT-6 Luna both passed this one. GPT-6 Luna answered sooner (2.5 s to 3.4 s), and GPT-6 Luna's reply cost less ($0.0001 to $0.0003); Claude Haiku 5.5 wrote 105 tokens of reply, GPT-6 Luna 70.

   • Claude Haiku 5.5

     Passed: Final answer North, 1085: right.

     Revenue = quantity × price, summed by region:
     
     - **West:** 90 + 310 + 240 + 225 = **865**
     - **East:** 120 + 135 + 310 + 360 = **925**
     - **North:** 180 + 240 + 620 + 45 = **1085**
     
     Final answer: North, 1085

     816 tokens in, 336 out (231 of them reasoning) · 3.4 s · $0.0003 · 1 message on Pro · answered by anthropic/claude-haiku-5.5 via Anthropic · October 7, 2026

   • GPT-6 Luna

     Passed: Final answer North — 1,085.00: right.

     West: $90 + $310 + $240 + $225 = $865  
     East: $120 + $135 + $310 + $360 = $925  
     North: $180 + $240 + $620 + $45 = $1,085  
     
     Final answer: North — $1,085.00

     640 tokens in, 135 out (65 of them reasoning) · 2.5 s · $0.0001 · 1 message on Pro · answered by openai/gpt-6-luna via OpenAI · September 27, 2026

2. 2. Average order value in August

   Everyday. Claude: 5 of 6 models passed, Claude Haiku 5.5 the cheapest at $0.0002 · GPT: 4 of 4 models passed, GPT-6 Luna the cheapest at $0.0001. The prompt in full.

   Claude Haiku 5.5 and GPT-6 Luna both passed this one. Claude Haiku 5.5 answered sooner (1.3 s to 2.6 s), and GPT-6 Luna's reply cost less ($0.0001 to $0.0002); Claude Haiku 5.5 wrote 208 tokens of reply, GPT-6 Luna 64.

   • Claude Haiku 5.5

     Passed: Final answer 300.00: right.

     August orders (1007–1012):
     
     - 1007: 2 × 120.00 = 240.00
     - 1008: 1 × 310.00 = 310.00
     - 1009: 2 × 310.00 = 620.00
     - 1010: 5 × 45.00 = 225.00
     - 1011: 3 × 120.00 = 360.00
     - 1012: 1 × 45.00 = 45.00
     
     Total revenue: 240 + 310 + 620 + 225 + 360 + 45 = 1,800.00
     
     Number of orders: 6
     
     Average: 1,800.00 / 6 = 300.00
     
     Final answer: 300.00

     824 tokens in, 208 out · 1.3 s · $0.0002 · 1 message on Pro · answered by anthropic/claude-haiku-5.5 via Anthropic · October 7, 2026

   • GPT-6 Luna

     Passed: Final answer 300.00: right.

     August revenue: $240 + $310 + $620 + $225 + $360 + $45 = $1,800.  
     There were 6 orders, so the average is $1,800 ÷ 6 = $300.00.
     
     Final answer: $300.00

     647 tokens in, 131 out (67 of them reasoning) · 2.6 s · $0.0001 · 1 message on Pro · answered by openai/gpt-6-luna via OpenAI · September 27, 2026

3. 3. Revenue change from July to August

   Everyday. Claude: 6 of 6 models passed, Claude Haiku 5.5 the cheapest at $0.0004 · GPT: 4 of 4 models passed, GPT-6 Luna the cheapest at $0.0001. The prompt in full.

   Claude Haiku 5.5 and GPT-6 Luna both passed this one. GPT-6 Luna answered sooner (2.5 s to 3.3 s), and GPT-6 Luna's reply cost less ($0.0001 to $0.0004); Claude Haiku 5.5 wrote 298 tokens of reply, GPT-6 Luna 66.

   • Claude Haiku 5.5

     Passed: Final answer 67.4%: right.

     **July 2026 revenue:**
     - 1001: 2 × 45 = 90
     - 1002: 1 × 120 = 120
     - 1003: 1 × 310 = 310
     - 1004: 4 × 45 = 180
     - 1005: 3 × 45 = 135
     - 1006: 2 × 120 = 240
     - Total: **1,075**
     
     **August 2026 revenue:**
     - 1007: 2 × 120 = 240
     - 1008: 1 × 310 = 310
     - 1009: 2 × 310 = 620
     - 1010: 5 × 45 = 225
     - 1011: 3 × 120 = 360
     - 1012: 1 × 45 = 45
     - Total: **1,800**
     
     **Change:** (1,800 − 1,075) / 1,075 = 725 / 1,075 ≈ 0.6744, or 67.4%.
     
     Final answer: 67.4%

     832 tokens in, 575 out (277 of them reasoning) · 3.3 s · $0.0004 · 1 message on Pro · answered by anthropic/claude-haiku-5.5 via Anthropic · October 7, 2026

   • GPT-6 Luna

     Passed: Final answer 67.4% increase: right.

     July revenue: $1,075.00. August revenue: $1,800.00.
     
     Percentage change = (($1,800 − $1,075) ÷ $1,075) × 100 = 67.4% increase.
     
     Final answer: 67.4% increase

     652 tokens in, 135 out (69 of them reasoning) · 2.5 s · $0.0001 · 1 message on Pro · answered by openai/gpt-6-luna via OpenAI · September 27, 2026

4. 4. A median, filtered two ways

   Hard. Claude: 6 of 6 models passed, Claude Haiku 5.5 the cheapest at $0.0002 · GPT: 4 of 4 models passed, GPT-6 Luna the cheapest at $0.0001. The prompt in full.

   Claude Haiku 5.5 and GPT-6 Luna both passed this one. They took about as long (Claude Haiku 5.5 2.6 s, GPT-6 Luna 2.5 s), and GPT-6 Luna's reply cost less ($0.0001 to $0.0002); Claude Haiku 5.5 wrote 126 tokens of reply, GPT-6 Luna 75.

   • Claude Haiku 5.5

     Passed: Final answer 6.25: right.

     Billing tickets with high priority:
     
     - T1: 5.5
     - T4: 2
     - T6: 9
     - T9: 7
     - T10: 26
     - T12: 4
     
     Sorted: 2, 4, 5.5, 7, 9, 26
     
     With six values, the median is the average of the middle two: (5.5 + 7) / 2 = 6.25
     
     Final answer: 6.25

     692 tokens in, 240 out (114 of them reasoning) · 2.6 s · $0.0002 · 1 message on Pro · answered by anthropic/claude-haiku-5.5 via Anthropic · October 7, 2026

   • GPT-6 Luna

     Passed: Final answer 6.25 hours: right.

     Billing high-priority resolution times, sorted: 2, 4, 5.5, 7, 9, 26. With six values, the median is the average of the middle two: (5.5 + 7) / 2 = 6.25 hours.
     
     Final answer: 6.25 hours

     512 tokens in, 128 out (53 of them reasoning) · 2.5 s · $0.0001 · 1 message on Pro · answered by openai/gpt-6-luna via OpenAI · September 27, 2026

5. 5. Correlation between ad spend and sign-ups

   Hard. Claude: 4 of 6 models passed, Claude Haiku 5.5 the cheapest at $0.0007 · GPT: 4 of 4 models passed, GPT-6 Luna the cheapest at $0.0004. The prompt in full.

   Claude Haiku 5.5 and GPT-6 Luna both passed this one. Claude Haiku 5.5 answered sooner (5.7 s to 6.7 s), and GPT-6 Luna's reply cost less ($0.0004 to $0.0007); Claude Haiku 5.5 wrote 223 tokens of reply, GPT-6 Luna 99.

   • Claude Haiku 5.5

     Passed: Final answer 0.97: right.

     **Working:**
     
     - n = 8
     - Mean ad_spend = 6150 / 8 = 768.75
     - Mean signups = 434 / 8 = 54.25
     - Sum of cross-deviations (Σ(x−x̄)(y−ȳ)) = 23,912.5
     - Sum of squared x-deviations (Σ(x−x̄)²) = 624,687.5
     - Sum of squared y-deviations (Σ(y−ȳ)²) = 971.5
     
     r = 23,912.5 / √(624,687.5 × 971.5) ≈ 23,912.5 / 24,635.9 ≈ 0.971
     
     Final answer: 0.97

     608 tokens in, 1,298 out (1,075 of them reasoning) · 5.7 s · $0.0007 · 1 message on Pro · answered by anthropic/claude-haiku-5.5 via Anthropic · October 7, 2026

   • GPT-6 Luna

     Passed: Final answer 0.97: right.

     Using \(r=\frac{\sum (x-\bar{x})(y-\bar{y})}{\sqrt{\sum(x-\bar{x})^2\sum(y-\bar{y})^2}}\), the centered sums are \(23{,}912.5\), \(624{,}687.5\), and \(971.5\). Thus \(r \approx 0.9707\).
     
     Final answer: 0.97

     451 tokens in, 651 out (552 of them reasoning) · 6.7 s · $0.0004 · 1 message on Pro · answered by openai/gpt-6-luna via OpenAI · September 27, 2026

• Claude Fable 5.1 vs GPT-6 Astra: 5 of 5 each; GPT-6 Astra answered 1.5× sooner at the median and cost 1.8× less. Claude Fable 5.1 vs GPT-6 Astra, on every job.

• Claude Fable 5.1 vs GPT-6.1 Sol: 5 of 5 each; GPT-6.1 Sol answered 1.6× sooner at the median and cost 17.8× less.

• Claude Fable 5.1 vs GPT-6 Sol: 5 of 5 each; GPT-6 Sol answered 1.7× sooner at the median and cost 8.4× less.

• Claude Fable 5.1 vs GPT-6 Luna: 5 of 5 each; GPT-6 Luna answered 2.0× sooner at the median and cost 160.7× less.

• Claude Opus 5.5 vs GPT-6 Astra: 5 of 5 each; GPT-6 Astra answered 1.4× sooner at the median and Claude Opus 5.5 cost 1.2× less. Claude Opus 5.5 vs GPT-6 Astra, on every job.

• Claude Opus 5.5 vs GPT-6.1 Sol: 5 of 5 each; GPT-6.1 Sol answered 1.5× sooner at the median and cost 8.2× less.

• Claude Opus 5.5 vs GPT-6 Sol: 5 of 5 each; GPT-6 Sol answered 1.6× sooner at the median and cost 3.9× less. Claude Opus 5.5 vs GPT-6 Sol, on every job.

• Claude Opus 5.5 vs GPT-6 Luna: 5 of 5 each; GPT-6 Luna answered 1.8× sooner at the median and cost 74.3× less.

• Claude Sonnet 5.5 vs GPT-6 Astra: 5 of 5 each; Claude Sonnet 5.5 answered 1.4× sooner at the median and cost 3.3× less.

• Claude Sonnet 5.5 vs GPT-6.1 Sol: 5 of 5 each; Claude Sonnet 5.5 answered 1.3× sooner at the median and GPT-6.1 Sol cost 3.0× less. GPT-6.1 Sol vs Claude Sonnet 5.5, on every job.

• Claude Sonnet 5.5 vs GPT-6 Sol: 5 of 5 each; Claude Sonnet 5.5 answered 1.2× sooner at the median and GPT-6 Sol cost 1.4× less. Claude Sonnet 5.5 vs GPT-6 Sol, on every job.

• Claude Sonnet 5.5 vs GPT-6 Luna: 5 of 5 each; they took about as long and GPT-6 Luna cost 26.7× less.

• Claude Sonnet 5 vs GPT-6 Astra: Claude Sonnet 5 4 of 5, GPT-6 Astra 5; GPT-6 Astra answered 1.6× sooner at the median and Claude Sonnet 5 cost 2.2× less.

• Claude Sonnet 5 vs GPT-6.1 Sol: Claude Sonnet 5 4 of 5, GPT-6.1 Sol 5; GPT-6.1 Sol answered 1.8× sooner at the median and cost 4.3× less.

• Claude Sonnet 5 vs GPT-6 Sol: Claude Sonnet 5 4 of 5, GPT-6 Sol 5; GPT-6 Sol answered 1.9× sooner at the median and cost 2.0× less. Claude Sonnet 5 vs GPT-6 Sol, on every job.

• Claude Sonnet 5 vs GPT-6 Luna: Claude Sonnet 5 4 of 5, GPT-6 Luna 5; GPT-6 Luna answered 2.1× sooner at the median and cost 39.1× less.

• Claude Haiku 4.5 vs GPT-6 Astra: Claude Haiku 4.5 3 of 5, GPT-6 Astra 5; Claude Haiku 4.5 answered 1.2× sooner at the median and cost 6.2× less.

• Claude Haiku 4.5 vs GPT-6.1 Sol: Claude Haiku 4.5 3 of 5, GPT-6.1 Sol 5; they took about as long and GPT-6.1 Sol cost 1.6× less.

• Claude Haiku 4.5 vs GPT-6 Sol: Claude Haiku 4.5 3 of 5, GPT-6 Sol 5; they took about as long and Claude Haiku 4.5 cost 1.4× less. Claude Haiku 4.5 vs GPT-6 Sol, on every job.

• Claude Haiku 4.5 vs GPT-6 Luna: Claude Haiku 4.5 3 of 5, GPT-6 Luna 5; they took about as long and GPT-6 Luna cost 14.2× less. Claude Haiku 4.5 vs GPT-6 Luna, on every job.

• Claude Haiku 5.5 vs GPT-6 Astra: 5 of 5 each; they took about as long and Claude Haiku 5.5 cost 43.1× less.

• Claude Haiku 5.5 vs GPT-6.1 Sol: 5 of 5 each; they took about as long and Claude Haiku 5.5 cost 4.4× less.

• Claude Haiku 5.5 vs GPT-6 Sol: 5 of 5 each; GPT-6 Sol answered 1.2× sooner at the median and Claude Haiku 5.5 cost 9.4× less.

• Claude Haiku 5.5 vs GPT-6 Luna: 5 of 5 each; GPT-6 Luna answered 1.3× sooner at the median and cost 2.0× less. Claude Haiku 5.5 vs GPT-6 Luna, on every job.

Every Claude and GPT reply above was checked the same way as every other model's, by the rules published with the prompts: how the data analysis prompts are scored, and each one in full.

• The lineups

  Claude: 6 models, Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5, Claude Sonnet 5, Claude Haiku 4.5, and Claude Haiku 5.5. GPT: 4 models, GPT-6 Astra, GPT-6.1 Sol, GPT-6 Sol, and GPT-6 Luna.

• Price per message

  The least expensive Claude model is Claude Haiku 5.5 (60 messages a day on Pro); the least expensive GPT model is GPT-6 Luna (60 messages a day on Pro).

• Context window

  Claude goes up to 1M tokens (Claude Fable 5.1); GPT up to 1.05M tokens (GPT-6 Astra).

• Images and PDFs

  Every model here reads images. Every model here takes a PDF as a whole file.

• On the Free plan

  Free's one-time trial of 5 messages covers Claude Haiku 5.5. Paid plans have them, with messages every month: Claude Fable 5.1 and GPT-6 Astra from Pro up.

In llmwise, a message to Claude or GPT goes to the model's maker, or through OpenRouter when llmwise can't reach the maker directly. The Privacy Policy has the details.