Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
Composer 2 is clearly ahead on the aggregate, 62 to 49. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Composer 2's sharpest advantage is in agentic, where it averages 61.7 against 42.9. The single biggest benchmark swing on the page is Terminal-Bench 2.0, 61.7% to 46.3%.
Composer 2 is also the more expensive model on tokens at $0.50 input / $2.50 output per 1M tokens, versus $0.20 input / $1.25 output per 1M tokens for GPT-5.4 nano. That is roughly 2.0x on output cost alone. GPT-5.4 nano gives you the larger context window at 400K, compared with 200K for Composer 2.
Pick Composer 2 if you want the stronger benchmark profile. GPT-5.4 nano only becomes the better choice if you want the cheaper token bill or you need the larger 400K context window.
Composer 2
61.7
GPT-5.4 nano
42.9
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.
Benchmark data for this category is coming soon.
Benchmark data for this category is coming soon.
Benchmark data for this category is coming soon.
Composer 2 is ahead overall, 62 to 49. The biggest single separator in this matchup is Terminal-Bench 2.0, where the scores are 61.7% and 46.3%.
Composer 2 has the edge for agentic tasks in this comparison, averaging 61.7 versus 42.9. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
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