GPT-5.5 Pro is the stronger all-rounder.Claude Opus 4.7 is cheaper.
Scores updated · 10 tests both models report · How we compare
Where each one wins
Tests won in each of the four areas where both have results. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.
Agents and facts rest on a single test each.
What it costs
Prices per million tokens, roughly 750,000 words. The bars show the cost of a million tokens read plus a million written.
Claude Opus 4.7 costs 86% less for the same work.
The biggest differences
The tests each model wins by the widest margin, up to three each. Scores are out of 100.
Where GPT-5.5 Pro pulls ahead
- Extremely hard research-level math problemsFrontierMath Tier 4+46.4points ahead
- Research-level physics problemsCritPt+18.6points ahead
- Unpublished advanced math problemsFrontierMath Tiers 1-3 (v2)+17.5points ahead
Where Claude Opus 4.7 pulls ahead
No clear win on a test scored out of 100.
Every test, side by side
All 10 tests both models report. The winning score is in its model's colour; marks a score checked independently.
ReasoningGPT-5.5 Pro
- CritPtGPT-5.5 Pro by 18.61230.6+18.6
- SimpleBenchGPT-5.5 Pro by 15.261.776.9+15.2
- Humanity's Last ExamGPT-5.5 Pro by 14.942.357.2+14.9
- ARC-AGI-2GPT-5.5 Pro by 8.475.884.2+8.4
MathGPT-5.5 Pro
- FrontierMath Tier 4GPT-5.5 Pro by 46.431.778+46.4
- FrontierMath Tiers 1-3 (v2)GPT-5.5 Pro by 17.570.287.7+17.5
Other results2 tests, not counted
Tests outside the eight areas. They are not counted above: several are summary scores built from other tests, or the same test under another name.
- frontiermath_tier_4_v1GPT-5.5 Pro by 16.722.939.6+16.7
- ARC-AGI-1GPT-5.5 Pro by 39295+3
Questions people ask
Which is better, Claude Opus 4.7 or GPT-5.5 Pro?
GPT-5.5 Pro wins all four areas where both have results: agents, reasoning, facts and math. Claude Opus 4.7 wins none, but costs 86% less.
Which is cheaper?
Claude Opus 4.7 costs $5.00 per million input tokens and $25.00 per million output tokens; GPT-5.5 Pro costs $30.00 and $180.00. That makes Claude Opus 4.7 about 86% cheaper for the same work.
How do you compare the two?
We use the 10 benchmark tests both models have published scores on. The verdict counts the 8 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 2 are listed but not counted, because several are summary scores or repeat a test. Each score is the one shown on the model's own page.