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AnthropicOpenAILLM matchup

Claude Sonnet 4.5vs.GPT-6 Sol

Which one is better?

GPT-6 Sol performs better than Claude Sonnet 4.5 and is cheaper: Claude Sonnet 4.5 costs 1.5 times as much.

GPT-6 Sol ahead
IntelligenceOverall index, 100 points = average
65.4

Claude Sonnet 4.5

Rank 71

110.5

GPT-6 Sol

Rank 13

GPT-6 Sol faster
SpeedTokens per second
59

Claude Sonnet 4.5

111

GPT-6 Sol

GPT-6 Sol cheaper
Price$ per 1M tokens
$6

Claude Sonnet 4.5

$4

GPT-6 Sol

GPT-6 Sol more popular
Popularity0 to 100
50

Claude Sonnet 4.5

Rank 102 of 785

73

GPT-6 Sol

Rank 3 of 785

Above 272,000 tokens of context, GPT-6 Sol costs more: $4 input and $15 output per 1M tokens.

Choose Claude Sonnet 4.5 for

No clear advantage

Choose GPT-6 Sol for

CodingLegalAgentsFinanceProductivityHealth

Where is the difference?

GPT-6 Sol is ahead in 5 of 10 areas, Sonnet 4.5 in none.

too little data: 5GPT-6 Sol ahead: 5

Areas in the overall index
CodingGPT-6 Sol +5361.7 to 114.9
AgentsGPT-6 Sol +3967.9 to 107.2
Reasoningonly GPT-6 Sol has a score
Mathematicsonly GPT-6 Sol has a score
Knowledgeonly GPT-6 Sol has a score
Generalonly GPT-6 Sol has a score
Multimodalonly GPT-6 Sol has a score
Specialist fields
LegalGPT-6 Sol +4064.7 to 104.8
FinanceGPT-6 Sol +3368.3 to 101.3
HealthGPT-6 Sol +3074.3 to 104.8

Bar length shows the gap in index points (full width 15 points, one standard deviation of the reference group). Solid means clearly ahead, hatched not certain yet, a thin grey bar level.

Show 3 more areas that do not count toward the overall index
ProductivityGPT-6 Sol +3267.0 to 99.4
Cybersecurityonly GPT-6 Sol has a score
Searchonly GPT-6 Sol has a score

Bar length shows the gap in index points (full width 15 points, one standard deviation of the reference group). Solid means clearly ahead, hatched not certain yet, a thin grey bar level.

Which model for which task?

Everyday tasks, translated from the area values above. Each row names the values it rests on.

Writing and debugging codeGPT-6 SolCoding 61.7 to 114.9
Maths and data analysisopenMathematics without a score for Sonnet 4.5, Reasoning without a score for Sonnet 4.5
Facts and researchopenKnowledge without a score for Sonnet 4.5, Search without a score for Sonnet 4.5
Agents and workflowsGPT-6 SolAgents 67.9 to 107.2
Fast chat repliesGPT-6 Sol59 to 111 tokens per second
Security analysisopenCybersecurity without a score for Sonnet 4.5
Many requests on a small budgetGPT-6 Sol$6 to $4 per 1M tokens
Finance, legal and medical textsGPT-6 SolFinance 68.3 to 101.3, Legal 64.7 to 104.8, Health 74.3 to 104.8
Images, screenshots and PDFsopenMultimodal without a score for Sonnet 4.5

See for yourself: same task, one attempt

The same prompt for both models. We show the latest attempt without fixes; it does not count toward the overall index.

Pelican on a bicycle

Prompt

Generate an SVG of a pelican riding a bicycle

Task origin: Simon Willison

Claude Sonnet 4.5

Claude Sonnet 4.5: Pelican on a bicycle
A community classic for free-form SVG drawing.

Oct 1, 2026 · 30 s · $0.04

Test details
Run date
Oct 1, 2026
API provider
openrouter
Requested API model
anthropic/claude-sonnet-4.5
Reasoning setting
high
Token limit including reasoning
8,192 tokens
Output tokens
2,710 tokens
Cost of the attempt
$0.0408
Response time
30.2 s
API model reported in response
anthropic/claude-sonnet-4.5
Pinned endpoint
Anthropic | anthropic/claude-4.5-sonnet-20250929
Temperature
Provider default
Test protocol
community-visual-tests-v1
Technical checks
Passed, not a quality rating

Visually reviewed. This individual test does not establish overall model quality.

GPT-6 Sol

GPT-6 Sol: Pelican on a bicycle
A community classic for free-form SVG drawing.

Oct 1, 2026 · 80 s · $0.04

Test details
Run date
Oct 1, 2026
API provider
openrouter
Requested API model
openai/gpt-6-sol
Reasoning setting
high
Token limit including reasoning
8,192 tokens
Output tokens
4,389 tokens
Cost of the attempt
$0.0439
Response time
80.5 s
API model reported in response
openai/gpt-6-sol
Pinned endpoint
OpenAI | openai/gpt-6-sol-20260922
Temperature
Provider default
Test protocol
community-visual-tests-v1
Technical checks
Passed, not a quality rating

Visually reviewed. This individual test does not establish overall model quality.

SVG short test

SVG short test

One SVG task with the same fixed settings for every model, without hidden thinking.

Prompt

Return only one standalone SVG of a pelican riding a bicycle. Use viewBox="0 0 800 600", simple shapes, two clearly visible wheels and a recognizable pelican with a long beak. At most 30 SVG elements and 1800 characters. No Markdown, explanations, comments, scripts, animation, CSS or external resources.

Claude Sonnet 4.5

Claude Sonnet 4.5: SVG short test

Oct 14, 2026 · $0.0105

Test details
Test run
Oct 14, 2026
Provider
anthropic
API model
anthropic/claude-sonnet-4.5
Output
686 tokens
Reasoning
API reports 0 reasoning tokens
Cost of the attempt
$0.0105
Test round
43b8c5c46830

GPT-6 Sol

Unavailable in this round

Claude Sonnet 4.5 and GPT-6 Sol in the overall index

Every model with a place in the overall index, both models of this matchup highlighted. You can add or hide other models.

Overall index (Gradually Meta-Score v4)

20 of 92 models

4 models in this view are measured at a lower reasoning effort than max in the overall index. Dashed column: lower reasoning effort than the top.

Claude Opus 5.5max126.1
Gemini 4 Carbonhigh125.8
Claude Fable 5.1max123.8
Claude Sonnet 5.5max122.8
Gemini 4 Argonhigh122.3
GPT-6 Astramax121.3
GPT-6.1 Solmax119.2
Muse Wonder Fullmax118.3
Claude Opus 5max117.2
Muse Wondermax113.4
Kimi K3.1 Promax112.9
Claude Fable 5max112.5
GPT-6 Solmax110.5
GPT-5.6 Solmax108.7
Muse Spark 1.3max107.4
Gemini 3.7 Flashhigh107.1
DeepSeek V4.1 Flash 1017max106.6
Gemini 3.8 Flashhigh106.5
GPT-6.1 Terramax105.3
Claude Sonnet 4.565.4

Popularity compared

How often the models are searched for, used and mentioned, on a scale from 0 to 100.

GPT-6 Sol is more popular than Claude Sonnet 4.5: 73 to 50 out of 100.

Over time

Weekly values from October 18, 2026 to November 7, 2026

Claude Sonnet 4.5GPT-6 Sol

All data side by side

The better value is bold. For the overall index only when the gap is clear.

MetricClaude Sonnet 4.5GPT-6 Sol
Intelligence
Overall indexpoints, 100 = reference group average, higher is better65.4110.5
RankRank 71 of 92Rank 13 of 92
Price per 1M tokens
Inputwhat you send$3$2above 272,000 tokens: $4
Outputwhat the model writes$15$10above 272,000 tokens: $15
Cost per task (own tests)average of 3 original-protocol tasks both models passed (SVG short test not included)$0.06$0.044
Speed
Tokens per second59111
Popularity
Popularitysearch, usage and mentions, 0 to 10050Rank 102 of 78573Rank 3 of 785
Technical
Context windowhow much text the model reads at once200,000 tokens≈ 300 A4 pages1.05 M tokens≈ 1,580 A4 pages
Knowledge cutoffJanuary 2025Apr 20, 2026
ReleasedSeptember 2025Sep 22, 2026
AvailabilityDiscontinuedActive
Open weightsnono

Prices without caching or batch discounts · Page count as a rule of thumb from Artificial Analysis

Is there a better choice?

Successor of Sonnet 4.5Claude Sonnet 4.6

Overall index 86.4, rank 44$3 input and $15 output per 1M tokens

GPT-6 Sol vs. Claude Sonnet 4.6
Successor of GPT-6 SolGPT-6.1 Sol

Overall index 119.2, rank 7$2 input and $10 output per 1M tokens

Sonnet 4.5 vs. GPT-6.1 Sol
As cheap as GPT-6 SolClaude Sonnet 5.5

Overall index 122.8, rank 4$2 input and $10 output per 1M tokens

GPT-6 Sol vs. Claude Sonnet 5.5

Shared benchmarks

Single results from the same benchmark version, task and metric. A value is bold only with the same test setup and a clear gap.

A: Claude Sonnet 4.5B: GPT-6 Sol

MedCodeOverall · higher is betterTest setup not documented as identicalClaude Sonnet 4.5: 40.6%GPT-6 Sol: 47.1%Vals AIAs of 10/29/2026
MedScribeOverall · higher is betterTest setup not documented as identicalClaude Sonnet 4.5: 84.5%GPT-6 Sol: 82.0%Vals AIAs of 10/29/2026
MMMU-ProOverall · higher is betterClaude Sonnet 4.5: 65.2%GPT-6 Sol: 70.3%Artificial AnalysisAs of 11/07/2026

More comparisons

Compare Claude Sonnet 4.5 and GPT-6 Sol with the models people compare them with most often.

Compare another matchup

The most popular comparisons

  1. 1GPT-6 Sol vs. GPT-5.6 Sol
  2. 2GPT-6 Sol vs. DeepSeek-V4.1-Flash
  3. 3GPT-6 Sol vs. Gemini 3.8 Flash
  4. 4GPT-6 Sol vs. GPT-5.6 Terra
  5. 5GPT-6 Astra vs. GPT-6 Sol
  6. 6Claude Opus 5.5 vs. Claude Sonnet 4.5
  7. 7Claude Haiku 5.5 vs. Claude Sonnet 4.5
  8. 8GPT-6 Sol vs. GLM-5.3-Flash
  9. 9Claude Sonnet 5.5 vs. GPT-6 Sol
Show all 54 comparisons
  1. 10Claude Sonnet 4.5 vs. Gemini 3.8 Flash
  2. 11GPT-6 Sol vs. Gemini 3.1 Pro Preview
  3. 12Claude Opus 4.8 vs. GPT-6 Sol
  4. 13GPT-6 Sol vs. GPT-5.4
  5. 14GPT-6 Sol vs. DeepSeek V4.1 Flash 1017
  6. 15GPT-6 Sol vs. Qwen 3.8 27B
  7. 16GPT-6 Sol vs. GPT-6 Luna
  8. 17Claude Sonnet 4.5 vs. GPT-6 Luna
  9. 18GPT-6 Sol vs. Kimi K3.1 Pro
  10. 19Claude Sonnet 4.6 vs. GPT-6 Sol
  11. 20GPT-6 Sol vs. Grok 4.7
  12. 21Claude Haiku 5.5 vs. GPT-6 Sol
  13. 22Claude Sonnet 4.5 vs. DeepSeek V4.1 Flash 1017
  14. 23Claude Opus 5.5 vs. GPT-6 Sol
  15. 24GPT-6 Sol vs. Qwen 3.8 Max 0902
  16. 25Claude Sonnet 5 vs. GPT-6 Sol
  17. 26GPT-6 Sol vs. Kimi K3
  18. 27Claude Fable 5.1 vs. GPT-6 Sol
  19. 28GPT-6 Sol vs. DeepSeek-V4-Pro
  20. 29Claude Sonnet 4.5 vs. GPT-6.1 Sol
  21. 30Claude Sonnet 4.5 vs. Qwen 3.8 27B
  22. 31GPT-6 Sol vs. GPT-5.6 Luna
  23. 32Claude Opus 5 vs. GPT-6 Sol
  24. 33Claude Sonnet 4.5 vs. Mistral Large 4
  25. 34Claude Sonnet 4.5 vs. Grok 4.7
  26. 35Claude Sonnet 4.5 vs. Mistral Medium 3.5
  27. 36Claude Opus 5 vs. Claude Sonnet 4.5
  28. 37Claude Sonnet 4.5 vs. DeepSeek-V4.1-Flash
  29. 38GPT-6 Sol vs. Mistral Large 4
  30. 39GPT-6 Sol vs. Gemini 4 Argon
  31. 40Claude Sonnet 4.5 vs. Qwen 3.8 Max 0902
  32. 41Claude Sonnet 4.5 vs. GPT-5.6 Luna
  33. 42Claude Sonnet 5.5 vs. Claude Sonnet 4.5
  34. 43Claude Sonnet 4.5 vs. Claude Haiku 4.5
  35. 44GPT-6 Sol vs. Gemini 3.6 Flash
  36. 45Claude Opus 4.6 vs. GPT-6 Sol
  37. 46GPT-6 Sol vs. Muse Wonder
  38. 47Claude Haiku 4.5 vs. GPT-6 Sol
  39. 48GPT-6 Sol vs. GPT-5.5
  40. 49GPT-6.1 Terra vs. GPT-6 Sol
  41. 50Claude Sonnet 4.5 vs. Gemini 4 Argon
  42. 51Claude Opus 4.5 vs. Claude Sonnet 4.5
  43. 52GPT-6 Sol vs. Gemini 4 Carbon
  44. 53Claude Sonnet 4.5 vs. Gemini 4 Carbon
  45. 54Claude Sonnet 4.5 vs. Kimi K3.1 Pro