Model vs model

Claude Opus 4.7 vs GPT-5.5

A debate-ready pair page: current winner, strongest alternative, decisive benchmarks, and the warning that should travel with the claim.

Use case · Coding copilot
Winner · Claude Opus 4.7
Sources · All public sources

Winner

Claude Opus 4.7

Anthropic

38benchmarks won

Professional reasoning

Versus · Coding copilot

Claude Opus 4.7 leads this compare set for coding copilot.

Claude Opus 4.738 of 62 wins

Verified but aging

17 shared benchmarks are still too close to call, so the win stays conditional. This compare uses all public sources, with provider-official evidence labeled separately.

Close calls: 17
Sources: All public

Full compare workspace Disagreement page

61%win share

Challenger

GPT-5.5

OpenAI

24benchmarks won

Professional reasoning

The cases in full

Claude Opus 4.7 case

Professional reasoning

GPT-5.5 case

Professional reasoning

What changes the outcome

Claude Opus 4.7: 68 visible benchmark gaps still leave room for the result to move.
GPT-5.5: 36 visible benchmark gaps still leave room for the result to move.

Why this result is surprising

17 shared benchmarks are still close, so the winner is narrower than it looks.
Overall coverage is doing a lot of the visible work in the public narrative.

Why this is not a clean win

17 shared benchmarks are still too close to call, so the win stays conditional. This compare uses all public sources, with provider-official evidence labeled separately.
GPT-5.5 remains the strongest alternative once you change use case, mode, or missing-evidence assumptions.

Open full compare workspace Open evidence page Open disagreement page

Decisive benchmarks

bench

Overall coverage

Claude Opus 4.7 has the cleanest edge here.

bench

AA-Omniscience non-hallucination

Claude Opus 4.7 has the cleanest edge here.

bench

Security

GPT-5.5 has the cleanest edge here.

64 of 138 benchmarks


Overall coverage BB · % Code · Coding	100%100% exact aliasverified runtime Row details Raw value 100% Percentile 100% Last updated archived Eligibility headline eligible Identity provider alias (0.92) Source label Claude Opus 4.7 Source row	85.7%22.7% exact aliasverified runtime Row details Raw value 85.7% Percentile 22.7% Last updated archived Eligibility headline eligible Identity provider alias (0.92) Source label GPT-5.5 Source row	77.3% spread
AA-Omniscience non-hallucination AA · % Text · Chat / text	45.9%83.1% exact aliasverified runtime Row details Raw value 45.9% Percentile 83.1% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label Claude Opus 4.7 (Non-reasoning, High Effort) Source row	7.3%19.7% exact aliasverified runtime Row details Raw value 7.3% Percentile 19.7% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label GPT-5.5 (Non-reasoning) Source row	63.4% spread
Security BB · % Code · Coding	76%44% exact aliasverified runtime Row details Raw value 76% Percentile 44% Last updated stale Eligibility headline eligible Identity provider alias (0.92) Source label openrouter/anthropic/claude-opus-4.7 Source row	85.3%100% exact aliasverified runtime Row details Raw value 85.3% Percentile 100% Last updated stale Eligibility headline eligible Identity provider alias (0.92) Source label openai/gpt-5.5 Source row	56% spread
Debugging BB · % Code · Coding	86.2%83.3% exact aliasverified runtime Row details Raw value 86.2% Percentile 83.3% Last updated stale Eligibility headline eligible Identity provider alias (0.92) Source label openrouter/anthropic/claude-opus-4.7 Source row	77.5%33.3% exact aliasverified runtime Row details Raw value 77.5% Percentile 33.3% Last updated stale Eligibility headline eligible Identity provider alias (0.92) Source label openai/gpt-5.5 Source row	50% spread
BrowseComp OFF · % Search · Search / tool use	79.3%33.3% Officialmanual verifiedmanual verified Row details Raw value 79.3% Percentile 33.3% Last updated stale Eligibility headline eligible Identity exact (1.00) Source label claude-opus-4-7 Source row	84.4%83.3% Officialmanual verifiedmanual verified Row details Raw value 84.4% Percentile 83.3% Last updated stale Eligibility headline eligible Identity exact (1.00) Source label gpt-5-5 Source row	50% spread
Refactoring BB · % Code · Coding	75.2%100% exact aliasverified runtime Row details Raw value 75.2% Percentile 100% Last updated stale Eligibility headline eligible Identity provider alias (0.92) Source label openrouter/anthropic/claude-opus-4.7 Source row	65.9%52.4% exact aliasverified runtime Row details Raw value 65.9% Percentile 52.4% Last updated stale Eligibility headline eligible Identity provider alias (0.92) Source label openai/gpt-5.5 Source row	47.6% spread
Time to first answer token AA · s Text · Chat / text	19.67s45.5% exact aliasverified runtime Row details Raw value 19.67s Percentile 45.5% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label Claude Opus 4.7 (Adaptive Reasoning, Max Effort) Source row	95.87s5.8% exact aliasverified runtime Row details Raw value 95.87s Percentile 5.8% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label GPT-5.5 (xhigh) Source row	39.7% spread
Terminal-Bench 2.0 OFF · % Code · Coding	69.4%66.7% Officialmanual verifiedmanual verified Row details Raw value 69.4% Percentile 66.7% Last updated stale Eligibility headline eligible Identity exact (1.00) Source label claude-opus-4-7 Source row	82.7%100% Officialmanual verifiedmanual verified Row details Raw value 82.7% Percentile 100% Last updated stale Eligibility headline eligible Identity exact (1.00) Source label gpt-5-5 Source row	33.3% spread
Agentic Index AA · index Code · Coding	4688.8% exact aliasverified runtime Row details Raw value 46 Percentile 88.8% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label Claude Opus 4.7 (Adaptive Reasoning, Max Effort) Source row	2658.2% exact aliasverified runtime Row details Raw value 26 Percentile 58.2% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label GPT-5.5 (Non-reasoning) Source row	30.6% spread
Humanity's Last Exam OFF · % Text · Reasoning / math / science	46.9%100% Officialmanual verifiedmanual verified Row details Raw value 46.9% Percentile 100% Last updated stale Eligibility headline eligible Identity exact (1.00) Source label claude-opus-4-7 Source row	41.4%71.4% Officialmanual verifiedmanual verified Row details Raw value 41.4% Percentile 71.4% Last updated stale Eligibility headline eligible Identity exact (1.00) Source label gpt-5-5 Source row	28.6% spread
Overall quality BB · % Code · Coding	89.7%86.4% exact aliasverified runtime Row details Raw value 89.7% Percentile 86.4% Last updated archived Eligibility headline eligible Identity provider alias (0.92) Source label Claude Opus 4.7 Source row	83.6%59.1% exact aliasverified runtime Row details Raw value 83.6% Percentile 59.1% Last updated archived Eligibility headline eligible Identity provider alias (0.92) Source label GPT-5.5 Source row	27.3% spread
GDPval-AA AA · rating Text · Professional reasoning	1,49089.4% exact aliasverified runtime Row details Raw value 1,490 Percentile 89.4% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label Claude Opus 4.7 (Adaptive Reasoning, Max Effort) Source row	1,12464.1% exact aliasverified runtime Row details Raw value 1,124 Percentile 64.1% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label GPT-5.5 (Non-reasoning) Source row	25.3% spread

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Page 1 of 6Page size

Overall coverage

BB · %

Code · Coding

100%100%

exact aliasverified runtime

Row details

Raw value: 100%
Percentile: 100%
Last updated: archived
Eligibility: headline eligible
Identity: provider alias (0.92)
Source label: Claude Opus 4.7

Source row

85.7%22.7%

exact aliasverified runtime

Row details

Raw value: 85.7%
Percentile: 22.7%
Last updated: archived
Eligibility: headline eligible
Identity: provider alias (0.92)
Source label: GPT-5.5

Source row

77.3% spread

AA-Omniscience non-hallucination

AA · %

Text · Chat / text

45.9%83.1%

exact aliasverified runtime

Row details

Raw value: 45.9%
Percentile: 83.1%
Last updated: recent
Eligibility: headline eligible
Identity: provider alias (0.94)
Source label: Claude Opus 4.7 (Non-reasoning, High Effort)

Source row

7.3%19.7%

exact aliasverified runtime

Row details

Raw value: 7.3%
Percentile: 19.7%
Last updated: recent
Eligibility: headline eligible
Identity: provider alias (0.94)
Source label: GPT-5.5 (Non-reasoning)

Source row

63.4% spread

Security

BB · %

Code · Coding

76%44%

exact aliasverified runtime

Row details

Raw value: 76%
Percentile: 44%
Last updated: stale
Eligibility: headline eligible
Identity: provider alias (0.92)
Source label: openrouter/anthropic/claude-opus-4.7

Source row

85.3%100%

exact aliasverified runtime

Row details

Raw value: 85.3%
Percentile: 100%
Last updated: stale
Eligibility: headline eligible
Identity: provider alias (0.92)
Source label: openai/gpt-5.5

Source row

56% spread

Debugging

BB · %

Code · Coding

86.2%83.3%

exact aliasverified runtime

Row details

Raw value: 86.2%
Percentile: 83.3%
Last updated: stale
Eligibility: headline eligible
Identity: provider alias (0.92)
Source label: openrouter/anthropic/claude-opus-4.7

Source row

77.5%33.3%

exact aliasverified runtime

Row details

Raw value: 77.5%
Percentile: 33.3%
Last updated: stale
Eligibility: headline eligible
Identity: provider alias (0.92)
Source label: openai/gpt-5.5

Source row

50% spread

BrowseComp

OFF · %

Search · Search / tool use

79.3%33.3%

Officialmanual verifiedmanual verified

Row details

Raw value: 79.3%
Percentile: 33.3%
Last updated: stale
Eligibility: headline eligible
Identity: exact (1.00)
Source label: claude-opus-4-7

Source row

84.4%83.3%

Officialmanual verifiedmanual verified

Row details

Raw value: 84.4%
Percentile: 83.3%
Last updated: stale
Eligibility: headline eligible
Identity: exact (1.00)
Source label: gpt-5-5

Source row

50% spread

Refactoring

BB · %

Code · Coding

75.2%100%

exact aliasverified runtime

Row details

Raw value: 75.2%
Percentile: 100%
Last updated: stale
Eligibility: headline eligible
Identity: provider alias (0.92)
Source label: openrouter/anthropic/claude-opus-4.7

Source row

65.9%52.4%

exact aliasverified runtime

Row details

Raw value: 65.9%
Percentile: 52.4%
Last updated: stale
Eligibility: headline eligible
Identity: provider alias (0.92)
Source label: openai/gpt-5.5

Source row

47.6% spread

Time to first answer token

AA · s

Text · Chat / text

19.67s45.5%

exact aliasverified runtime

Row details

Raw value: 19.67s
Percentile: 45.5%
Last updated: recent
Eligibility: headline eligible
Identity: provider alias (0.94)
Source label: Claude Opus 4.7 (Adaptive Reasoning, Max Effort)

Source row

95.87s5.8%

exact aliasverified runtime

Row details

Raw value: 95.87s
Percentile: 5.8%
Last updated: recent
Eligibility: headline eligible
Identity: provider alias (0.94)
Source label: GPT-5.5 (xhigh)

Source row

39.7% spread

Terminal-Bench 2.0

OFF · %

Code · Coding

69.4%66.7%

Officialmanual verifiedmanual verified

Row details

Raw value: 69.4%
Percentile: 66.7%
Last updated: stale
Eligibility: headline eligible
Identity: exact (1.00)
Source label: claude-opus-4-7

Source row

82.7%100%

Officialmanual verifiedmanual verified

Row details

Raw value: 82.7%
Percentile: 100%
Last updated: stale
Eligibility: headline eligible
Identity: exact (1.00)
Source label: gpt-5-5

Source row

33.3% spread

Agentic Index

AA · index

Code · Coding

4688.8%

exact aliasverified runtime

Row details

Raw value: 46
Percentile: 88.8%
Last updated: recent
Eligibility: headline eligible
Identity: provider alias (0.94)
Source label: Claude Opus 4.7 (Adaptive Reasoning, Max Effort)

Source row

2658.2%

exact aliasverified runtime

Row details

Raw value: 26
Percentile: 58.2%
Last updated: recent
Eligibility: headline eligible
Identity: provider alias (0.94)
Source label: GPT-5.5 (Non-reasoning)

Source row

30.6% spread

Humanity's Last Exam

OFF · %

Text · Reasoning / math / science

46.9%100%

Officialmanual verifiedmanual verified

Row details

Raw value: 46.9%
Percentile: 100%
Last updated: stale
Eligibility: headline eligible
Identity: exact (1.00)
Source label: claude-opus-4-7

Source row

41.4%71.4%

Officialmanual verifiedmanual verified

Row details

Raw value: 41.4%
Percentile: 71.4%
Last updated: stale
Eligibility: headline eligible
Identity: exact (1.00)
Source label: gpt-5-5

Source row

28.6% spread

Overall quality

BB · %

Code · Coding

89.7%86.4%

exact aliasverified runtime

Row details

Raw value: 89.7%
Percentile: 86.4%
Last updated: archived
Eligibility: headline eligible
Identity: provider alias (0.92)
Source label: Claude Opus 4.7

Source row

83.6%59.1%

exact aliasverified runtime

Row details

Raw value: 83.6%
Percentile: 59.1%
Last updated: archived
Eligibility: headline eligible
Identity: provider alias (0.92)
Source label: GPT-5.5

Source row

27.3% spread

GDPval-AA

AA · rating

Text · Professional reasoning

1,49089.4%

exact aliasverified runtime

Row details

Raw value: 1,490
Percentile: 89.4%
Last updated: recent
Eligibility: headline eligible
Identity: provider alias (0.94)
Source label: Claude Opus 4.7 (Adaptive Reasoning, Max Effort)

Source row

1,12464.1%

exact aliasverified runtime

Row details

Raw value: 1,124
Percentile: 64.1%
Last updated: recent
Eligibility: headline eligible
Identity: provider alias (0.94)
Source label: GPT-5.5 (Non-reasoning)

Source row

25.3% spread

Claude Opus 4.7 vs GPT-5.5

Claude Opus 4.7

Claude Opus 4.7 leads this compare set for coding copilot.

GPT-5.5

Claude Opus 4.7 case

GPT-5.5 case

What changes the outcome

Why this result is surprising

Why this is not a clean win

Share the recommendation with the source data attached.

Open or copy the stable surfaces

Use the exact public framing

Pick the voice before you post

Compose a post that keeps the warning attached

Decisive benchmarks

Loading model comparison.

Claude Opus 4.7 vs GPT-5.5

Claude Opus 4.7

Claude Opus 4.7 leads this compare set for coding copilot.

GPT-5.5

Claude Opus 4.7 case

GPT-5.5 case

What changes the outcome

Why this result is surprising

Why this is not a clean win

Share the recommendation with the source data attached.

Open or copy the stable surfaces

Use the exact public framing

Pick the voice before you post

Compose a post that keeps the warning attached

Decisive benchmarks