Head-to-head comparison across 0benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Claude 4 Sonnet
52
GPT-5.5 Pro
100
Benchmark data for Claude 4 Sonnet and GPT-5.5 Pro is coming soon on BenchLM.
Claude 4 Sonnet
GPT-5.5 Pro
$3 / $15
$30 / $180
40 t/s
N/A
1.33s
N/A
200K
1M
Benchmark data for Claude 4 Sonnet and GPT-5.5 Pro is coming soon on BenchLM.
BenchLM has partial data for these models, but not enough overlapping benchmark coverage to produce a fair score-level comparison yet.
GPT-5.5 Pro is priced at $30.00 input / $180.00 output per 1M tokens, versus $3.00 input / $15.00 output per 1M tokens for Claude 4 Sonnet. GPT-5.5 Pro has the larger context window at 1M, compared with 200K for Claude 4 Sonnet.
Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.
BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.
Claude 4 Sonnet: $3.00 input / $15.00 output per 1M tokens GPT-5.5 Pro: $30.00 input / $180.00 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.
For engineers, researchers, and the plain curious — a weekly brief on new models, ranking shifts, and pricing changes.
Free. No spam. Unsubscribe anytime.