Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
Gemini 3.1 Pro is clearly ahead on the aggregate, 83 to 62. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Gemini 3.1 Pro's sharpest advantage is in agentic, where it averages 76.1 against 61.7. The single biggest benchmark swing on the page is React Native Evals, 97.2% to 79.1%.
Gemini 3.1 Pro is also the more expensive model on tokens at $1.25 input / $5.00 output per 1M tokens, versus $0.50 input / $2.50 output per 1M tokens for Composer 2. That is roughly 2.0x on output cost alone. Composer 2 is the reasoning model in the pair, while Gemini 3.1 Pro is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. Gemini 3.1 Pro gives you the larger context window at 1M, compared with 200K for Composer 2.
Pick Gemini 3.1 Pro if you want the stronger benchmark profile. Composer 2 only becomes the better choice if you want the cheaper token bill or you want the stronger reasoning-first profile.
Composer 2
61.7
Gemini 3.1 Pro
76.1
Comparable scores for this category are coming soon. One or both models do not have sourced results here yet.
Comparable scores for this category are coming soon. One or both models do not have sourced results here yet.
Comparable scores for this category are coming soon. One or both models do not have sourced results here yet.
Comparable scores for this category are coming soon. One or both models do not have sourced results here yet.
Comparable scores for this category are coming soon. One or both models do not have sourced results here yet.
Comparable scores for this category are coming soon. One or both models do not have sourced results here yet.
Comparable scores for this category are coming soon. One or both models do not have sourced results here yet.
Gemini 3.1 Pro is ahead overall, 83 to 62. The biggest single separator in this matchup is React Native Evals, where the scores are 97.2% and 79.1%.
Gemini 3.1 Pro has the edge for agentic tasks in this comparison, averaging 76.1 versus 61.7. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
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