Skip to main content

AnthropicOpenAILLM matchup

Claude Opus 4.6vs.GPT-6 Luna

Which one is better?

GPT-6 Luna performs better than Claude Opus 4.6 and is cheaper: Claude Opus 4.6 costs 50 times as much.

GPT-6 Luna ahead
IntelligenceOverall index, 100 points = average
81.8

Claude Opus 4.6

Rank 52

96.3

GPT-6 Luna

Rank 35

GPT-6 Luna faster
SpeedTokens per second
52

Claude Opus 4.6

101

GPT-6 Luna

GPT-6 Luna cheaper
Price$ per 1M tokens
$10

Claude Opus 4.6

$0.20

GPT-6 Luna

GPT-6 Luna more popular
Popularity0 to 100
36

Claude Opus 4.6

Rank 392 of 785

60

GPT-6 Luna

Rank 30 of 785

Above 272,000 tokens of context, GPT-6 Luna costs more: $0.20 input and $0.75 output per 1M tokens.

Choose Claude Opus 4.6 for

No clear advantage

Choose GPT-6 Luna for

GeneralProductivityReasoningAgentsMultimodalEducationCodingHealth (not certain)

Where is the difference?

Strengths at a glance

Opus 4.6GPT-6 LunaMedian of all ranked models

75859510565CodingGPT-6 LunaReasoningGPT-6 LunaAgentsGPT-6 LunaGeneralGPT-6 LunaMultimodalGPT-6 LunaHealthslightlyGPT-6 Luna
CodingGPT-6 Luna ahead
Opus 4.684.0no rank
GPT-6 Luna97.5Rank 35
Median of ranked models84.1

95 % range: Opus 4.6 77.6 to 90.4, GPT-6 Luna 94.5 to 100.5.

AreaOpus 4.6GPT-6 Luna

The same values and verdicts as the bars below. In the close-up the net starts at 65 points, just below the weaker model's lowest value; the reference group average is 100. Not in the net because a model has no own value there or the data are too thin: Mathematics, Knowledge, Finance, Legal.

GPT-6 Luna is ahead in 5 of 10 areas, Opus 4.6 in none.

too little data: 4GPT-6 Luna slightly ahead: 1GPT-6 Luna ahead: 5

Areas in the overall index
GeneralGPT-6 Luna +2173.0 to 94.4
ReasoningGPT-6 Luna +1582.4 to 97.8
AgentsGPT-6 Luna +1584.7 to 99.5
MultimodalGPT-6 Luna +1477.8 to 92.0
CodingGPT-6 Luna +1484.0 to 97.5
Mathematicsonly GPT-6 Luna has a score
Knowledgeonly GPT-6 Luna has a score
Specialist fields
Healthleaning GPT-6 Lunanot certain · 2 tests each
Financetoo little data87.4 to 98.3
Legaltoo little data87.6 to 90.7

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 4 more areas that do not count toward the overall index
ProductivityGPT-6 Luna +1971.2 to 90.5
EducationGPT-6 Luna +1478.8 to 93.0
Cybersecurityonly GPT-6 Luna has a score
Searchonly GPT-6 Luna 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 LunaCoding 84.0 to 97.5
Maths and data analysisGPT-6 LunaMathematics without a score for Opus 4.6, Reasoning 82.4 to 97.8
Facts and researchopenKnowledge without a score for Opus 4.6, Search without a score for Opus 4.6
Agents and workflowsGPT-6 LunaAgents 84.7 to 99.5
Fast chat repliesGPT-6 Luna52 to 101 tokens per second
Security analysisopenCybersecurity without a score for Opus 4.6
Many requests on a small budgetGPT-6 Luna$10 to $0.20 per 1M tokens
Finance, legal and medical textsleaning GPT-6 LunaFinance 87.4 to 98.3 (too little data), Legal 87.6 to 90.7 (too little data), Health 89.6 to 95.2
Images, screenshots and PDFsGPT-6 LunaMultimodal 77.8 to 92.0

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 Opus 4.6

Claude Opus 4.6: Pelican on a bicycle
A community classic for free-form SVG drawing.

Oct 1, 2026 · 85 s · $0.16

Test details
Run date
Oct 1, 2026
API provider
openrouter
Requested API model
anthropic/claude-opus-4.6
Reasoning setting
high
Token limit including reasoning
8,192 tokens
Output tokens
6,460 tokens
Cost of the attempt
$0.1616
Response time
85.1 s
API model reported in response
anthropic/claude-opus-4.6
Pinned endpoint
Anthropic | anthropic/claude-4.6-opus-20260205
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 Luna

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

Oct 1, 2026 · 47 s · $0.0022

Test details
Run date
Oct 1, 2026
API provider
openrouter
Requested API model
openai/gpt-6-luna
Reasoning setting
high
Token limit including reasoning
8,192 tokens
Output tokens
4,493 tokens
Cost of the attempt
$0.0022
Response time
46.7 s
API model reported in response
openai/gpt-6-luna
Pinned endpoint
OpenAI | openai/gpt-6-luna-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 Opus 4.6

Claude Opus 4.6: SVG short test

Oct 14, 2026 · $0.0196

Test details
Test run
Oct 14, 2026
Provider
anthropic
API model
anthropic/claude-opus-4.6
Output
766 tokens
Reasoning
API reports 0 reasoning tokens
Cost of the attempt
$0.0196
Test round
43b8c5c46830

GPT-6 Luna

Unavailable in this round

Claude Opus 4.6 and GPT-6 Luna 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 Lunamax96.3
Claude Opus 4.6max81.8

Popularity compared

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

GPT-6 Luna is more popular than Claude Opus 4.6: 60 to 36 out of 100.

Over time

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

Claude Opus 4.6GPT-6 Luna

All data side by side

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

MetricClaude Opus 4.6GPT-6 Luna
Intelligence
Overall indexpoints, 100 = reference group average, higher is better81.896.3
RankRank 52 of 92Rank 35 of 92
Price per 1M tokens
Inputwhat you send$5$0.10above 272,000 tokens: $0.20
Outputwhat the model writes$25$0.50above 272,000 tokens: $0.75
Cost per task (own tests)average of 3 original-protocol tasks both models passed (SVG short test not included)$0.18$0.003
Speed
Tokens per second52101
Popularity
Popularitysearch, usage and mentions, 0 to 10036Rank 392 of 78560Rank 30 of 785
Technical
Context windowhow much text the model reads at once1 M tokens≈ 1,500 A4 pages1.05 M tokens≈ 1,580 A4 pages
Knowledge cutoffMay 2025May 18, 2026
ReleasedFebruary 2026Sep 22, 2026
AvailabilityActiveActive
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 Opus 4.6Claude Opus 4.7

Overall index 93.5, rank 39$5 input and $25 output per 1M tokens

GPT-6 Luna vs. Claude Opus 4.7
As cheap as GPT-6 LunaClaude Haiku 5.5

Overall index 103.4, rank 20$0.10 input and $0.50 output per 1M tokens

GPT-6 Luna vs. Claude Haiku 5.5
Best model in the overall indexClaude Opus 5.5

Overall index 126.1, rank 1$4 input and $20 output per 1M tokens

GPT-6 Luna vs. Claude Opus 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 Opus 4.6B: GPT-6 Luna

LMArena Code Arena WebDevOverall · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,546GPT-6 Luna: 1,579LMArenaAs of 10/28/2026
LMArena Text, Style ControlOverall · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,503GPT-6 Luna: 1,441LMArenaAs of 10/28/2026
LMArena Vision, Style ControlOverall · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,299GPT-6 Luna: 1,240LMArenaAs of 10/19/2026
MedCodeOverall · higher is betterTest setup not documented as identicalClaude Opus 4.6: 48.2%GPT-6 Luna: 44.7%Vals AIAs of 10/29/2026
MedScribeOverall · higher is betterTest setup not documented as identicalClaude Opus 4.6: 86.7%GPT-6 Luna: 83.7%Vals AIAs of 10/29/2026
MMMU-ProOverall · higher is betterClaude Opus 4.6: 75.4%GPT-6 Luna: 79.7%Artificial AnalysisAs of 11/07/2026
Vibe Code Bench v1.1Overall · higher is betterTest setup not documented as identicalClaude Opus 4.6: 57.6%GPT-6 Luna: 81.6%Vals AIAs of 11/05/2026
LMArena Code Arena WebDevHTML development · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,559GPT-6 Luna: 1,595LMArenaAs of 10/28/2026
LMArena Text, Style ControlBusiness, management and finance · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,500GPT-6 Luna: 1,441LMArenaAs of 10/28/2026
LMArena Vision, Style ControlChinese · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,352GPT-6 Luna: 1,292LMArenaAs of 10/19/2026
Show 35 more benchmarks
LMArena Code Arena WebDevImage to WebDev · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,543GPT-6 Luna: 1,571LMArenaAs of 10/19/2026
LMArena Text, Style ControlChinese · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,550GPT-6 Luna: 1,483LMArenaAs of 10/28/2026
LMArena Vision, Style ControlCreative writing with images · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,309GPT-6 Luna: 1,232LMArenaAs of 10/19/2026
LMArena Code Arena WebDevReact development · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,539GPT-6 Luna: 1,575LMArenaAs of 10/28/2026
LMArena Text, Style ControlCoding · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,548GPT-6 Luna: 1,506LMArenaAs of 10/28/2026
LMArena Vision, Style ControlDiagram understanding · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,324GPT-6 Luna: 1,275LMArenaAs of 10/19/2026
LMArena Code Arena WebDevWeb development · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,546GPT-6 Luna: 1,579LMArenaAs of 10/28/2026
LMArena Text, Style ControlCreative writing · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,499GPT-6 Luna: 1,410LMArenaAs of 10/28/2026
LMArena Vision, Style ControlEnglish · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,301GPT-6 Luna: 1,228LMArenaAs of 10/19/2026
LMArena Text, Style ControlEnglish · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,513GPT-6 Luna: 1,449LMArenaAs of 10/28/2026
LMArena Vision, Style ControlHomework · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,325GPT-6 Luna: 1,281LMArenaAs of 10/19/2026
LMArena Text, Style ControlEntertainment, sports and media · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,491GPT-6 Luna: 1,413LMArenaAs of 10/28/2026
LMArena Vision, Style ControlOptical character recognition · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,314GPT-6 Luna: 1,251LMArenaAs of 10/19/2026
LMArena Text, Style ControlExcluding ties · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,522GPT-6 Luna: 1,441LMArenaAs of 10/28/2026
LMArena Text, Style ControlExpert prompts · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,544GPT-6 Luna: 1,489LMArenaAs of 10/28/2026
LMArena Text, Style ControlFrench prompts · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,509GPT-6 Luna: 1,467LMArenaAs of 10/28/2026
LMArena Text, Style ControlGerman prompts · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,507GPT-6 Luna: 1,435LMArenaAs of 10/28/2026
LMArena Text, Style ControlHard prompts · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,531GPT-6 Luna: 1,464LMArenaAs of 10/28/2026
LMArena Text, Style ControlHard prompts, English · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,535GPT-6 Luna: 1,470LMArenaAs of 10/28/2026
LMArena Text, Style ControlInstruction following · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,511GPT-6 Luna: 1,438LMArenaAs of 10/28/2026
LMArena Text, Style ControlJapanese prompts · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,498GPT-6 Luna: 1,421LMArenaAs of 10/28/2026
LMArena Text, Style ControlKorean prompts · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,447GPT-6 Luna: 1,408LMArenaAs of 10/28/2026
LMArena Text, Style ControlLegal and government · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,509GPT-6 Luna: 1,448LMArenaAs of 10/28/2026
LMArena Text, Style ControlLife, physical and social science · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,527GPT-6 Luna: 1,453LMArenaAs of 10/28/2026
LMArena Text, Style ControlLonger queries · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,521GPT-6 Luna: 1,451LMArenaAs of 10/28/2026
LMArena Text, Style ControlMath · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,516GPT-6 Luna: 1,447LMArenaAs of 10/28/2026
LMArena Text, Style ControlMathematical professions · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,524GPT-6 Luna: 1,466LMArenaAs of 10/28/2026
LMArena Text, Style ControlMedicine and healthcare · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,517GPT-6 Luna: 1,433LMArenaAs of 10/28/2026
LMArena Text, Style ControlMulti-turn · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,517GPT-6 Luna: 1,441LMArenaAs of 10/28/2026
LMArena Text, Style ControlNon-English · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,488GPT-6 Luna: 1,429LMArenaAs of 10/28/2026
LMArena Text, Style ControlPolish prompts · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,503GPT-6 Luna: 1,446LMArenaAs of 10/28/2026
LMArena Text, Style ControlRussian prompts · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,505GPT-6 Luna: 1,438LMArenaAs of 10/28/2026
LMArena Text, Style ControlSoftware and IT services · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,537GPT-6 Luna: 1,491LMArenaAs of 10/28/2026
LMArena Text, Style ControlSpanish prompts · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,494GPT-6 Luna: 1,442LMArenaAs of 10/28/2026
LMArena Text, Style ControlWriting, literature and language · higher is betterTest setup not documented as identicalClaude Opus 4.6: 1,500GPT-6 Luna: 1,424LMArenaAs of 10/28/2026

More comparisons

Compare Claude Opus 4.6 and GPT-6 Luna with the models people compare them with most often.

Compare another matchup

The most popular comparisons

  1. 1GPT-6 Luna vs. GPT-5.6 Terra
  2. 2Claude Haiku 5.5 vs. GPT-6 Luna
  3. 3Claude Opus 4.6 vs. Gemini 3.8 Flash
  4. 4GPT-6 Luna vs. Gemini 3.8 Flash
  5. 5GPT-6 Luna vs. DeepSeek-V4.1-Flash
  6. 6GPT-6 Luna vs. GPT-5.4 mini
  7. 7GPT-6 Astra vs. GPT-6 Luna
  8. 8GPT-6 Luna vs. GLM-5.3-Flash
  9. 9Claude Opus 5.5 vs. Claude Opus 4.6
Show all 65 comparisons
  1. 10GPT-6.1 Sol vs. GPT-6 Luna
  2. 11GPT-6 Luna vs. DeepSeek-V4-Pro
  3. 12Claude Sonnet 5 vs. GPT-6 Luna
  4. 13GPT-6 Luna vs. Gemini 3.5 Flash-Lite
  5. 14Claude Haiku 4.5 vs. GPT-6 Luna
  6. 15Claude Opus 4.6 vs. DeepSeek-V4.1-Flash
  7. 16Claude Sonnet 4.6 vs. GPT-6 Luna
  8. 17GPT-6 Luna vs. GPT-5.4
  9. 18GPT-6 Luna vs. Gemini 3.1 Pro Preview
  10. 19Claude Sonnet 5.5 vs. GPT-6 Luna
  11. 20GPT-6 Luna vs. DeepSeek V4.1 Flash 1017
  12. 21Claude Sonnet 5.5 vs. Claude Opus 4.6
  13. 22Claude Opus 4.8 vs. GPT-6 Luna
  14. 23GPT-6 Luna vs. GPT-5.6 Sol
  15. 24GPT-6 Luna vs. Grok 4.7
  16. 25GPT-6 Luna vs. Gemini 3.6 Flash
  17. 26GPT-6 Sol vs. GPT-6 Luna
  18. 27Claude Sonnet 4.5 vs. GPT-6 Luna
  19. 28GPT-6 Luna vs. Muse Spark 1.3
  20. 29Claude Opus 4.6 vs. GLM-5.3-Flash
  21. 30GPT-6 Luna vs. DeepSeek-V4-Flash
  22. 31Claude Opus 4.6 vs. Qwen 3.8 27B
  23. 32Claude Opus 5.5 vs. GPT-6 Luna
  24. 33Claude Opus 4.6 vs. GPT-6.1 Sol
  25. 34GPT-6 Luna vs. Qwen 3.8 27B
  26. 35Claude Opus 4.6 vs. GPT-6 Astra
  27. 36GPT-6 Luna vs. Qwen 3.8 Max 0902
  28. 37GPT-6 Luna vs. GLM-5.2
  29. 38GPT-6 Luna vs. GPT-5.5
  30. 39GPT-6 Luna vs. Gemini 3.7 Flash
  31. 40Claude Haiku 5.5 vs. Claude Opus 4.6
  32. 41Claude Fable 5.1 vs. GPT-6 Luna
  33. 42GPT-6 Luna vs. GLM-5.3
  34. 43GPT-6 Luna vs. Grok 4.6
  35. 44Claude Opus 4.5 vs. GPT-6 Luna
  36. 45Claude Opus 4.6 vs. DeepSeek V4.1 Flash 1017
  37. 46GPT-6 Luna vs. MiMo-V2.5
  38. 47Claude Fable 5 vs. GPT-6 Luna
  39. 48Claude Opus 4.6 vs. GPT-6 Sol
  40. 49GPT-6 Luna vs. Mistral Large 4
  41. 50GPT-6 Luna vs. Gemini 3.5 Flash
  42. 51GPT-6.1 Terra vs. GPT-6 Luna
  43. 52Claude Opus 4.6 vs. Claude Sonnet 4.6
  44. 53Claude Opus 4.6 vs. GLM-5.3
  45. 54Claude Fable 5.1 vs. Claude Opus 4.6
  46. 55Claude Opus 4.6 vs. Muse Spark 1.3
  47. 56GPT-6 Luna vs. Mistral Medium 3.5
  48. 57GPT-6 Luna vs. Grok 4.5
  49. 58Claude Opus 4.7 vs. GPT-6 Luna
  50. 59Claude Opus 4.6 vs. Mistral Large 4
  51. 60Claude Opus 4.6 vs. Gemini 3.6 Flash
  52. 61Claude Opus 4.8 vs. Claude Opus 4.6
  53. 62GPT-6 Luna vs. Gemini 4 Argon
  54. 63Claude Opus 4.6 vs. Gemini 4 Argon
  55. 64Claude Opus 4.6 vs. Kimi K3.1 Pro
  56. 65Claude Opus 4.6 vs. Gemini 4 Carbon