Head-to-head comparison across 0benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
GPT-5.3 Codex
88
GPT-5 nano
--
Benchmark data for GPT-5.3 Codex and GPT-5 nano is coming soon on BenchLM.
GPT-5.3 Codex
GPT-5 nano
$1.75 / $14
$0.05 / $0.4
79 t/s
137 t/s
88.26s
83.30s
400K
400K
Benchmark data for GPT-5.3 Codex and GPT-5 nano is coming soon on BenchLM.
BenchLM does not have sourced benchmark coverage for GPT-5 nano yet. This comparison is currently limited to metadata such as context window, reasoning mode, and pricing where available.
GPT-5.3 Codex is priced at $1.75 input / $14.00 output per 1M tokens, versus $0.05 input / $0.40 output per 1M tokens for GPT-5 nano.
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: $1.75 input / $14.00 output per 1M tokens GPT-5 nano: $0.05 input / $0.40 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.