Head-to-head comparison across 0benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
GPT-5.3 Codex
89
GPT-5 (high)
--
Benchmark data for GPT-5.3 Codex and GPT-5 (high) is coming soon on BenchLM.
GPT-5.3 Codex
GPT-5 (high)
$2.5 / $10
$null / $null
79 t/s
83 t/s
88.26s
36.28s
400K
128K
Benchmark data for GPT-5.3 Codex and GPT-5 (high) is coming soon on BenchLM.
BenchLM does not have sourced benchmark coverage for GPT-5 (high) yet. This comparison is currently limited to metadata such as context window, reasoning mode, and pricing where available.
GPT-5.3 Codex has the larger context window at 400K, compared with 128K for GPT-5 (high).
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.
GPT-5.3 Codex: $2.50 input / $10.00 output per 1M tokens GPT-5 (high): Pricing unavailable Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.
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