GPT-5.1 wins more areas, narrowly.
Scores updated · 8 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.
Coding, reasoning, images and charts and following instructions 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.
The biggest differences
The tests each model wins by the widest margin, up to three each. Scores are out of 100.
Where GPT-5.1 pulls ahead
- Keeps track of context across a multi-turn chatMulti-Challenge+12.2points ahead
Where GPT-5.1 Instant pulls ahead
No clear win on a test scored out of 100.
Every test, side by side
All 8 tests both models report. The winning score is in its model's colour; marks a score checked independently.
Following instructionsGPT-5.1
- Multi-ChallengeGPT-5.1 by 12.263.451.2+12.2
Other results4 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.
- AIME 2025tie9494tie
- FrontierMath (overall)tie26.726.7tie
- Tau2 airlinetie6767tie
- τ²-Bench (Retail)tie77.977.9tie
Questions people ask
Which is better, GPT-5.1 or GPT-5.1 Instant?
GPT-5.1 wins one of the four areas where both have results: following instructions. GPT-5.1 Instant wins none. They are level on coding, reasoning and images and charts.
Which is better for coding?
Neither. All 1 coding tests both models report are ties.
How do you compare the two?
We use the 8 benchmark tests both models have published scores on. The verdict counts the 4 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 4 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.