TPSTokens Per Second

GPT-5.3-Codex

OpenAI🇺🇸 United States
active

First model combining the Codex and GPT-5 training stacks — best-in-class code generation plus general-purpose reasoning in one model, ~25% faster than its predecessor.

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Context window400K tokens

Version History

gpt-5-3-codex-launchmajor

GPT-5.3-Codex launches. First model combining the Codex and GPT-5 training stacks — best-in-class code generation plus general-purpose reasoning in one model, ~25% faster than its predecessor.

Benchmark Scores

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91.5%
GPQA
118.0 tokens_per_sec
Speed (tok/s)