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OpenAIactive
GPT-5.3 Codex
gpt-5.3-codex25% faster than GPT-5.2-Codex. Best agentic coding model before GPT-5.4.
Context Window
1M
tokens
Max Output
128K
tokens
Input Price
$2.00
per 1M tokens
Output Price
$12.00
per 1M tokens
Details
Familygpt-5
Training Cutoff2025-08-31
ReleasedFebruary 15, 2026
Capabilities
FunctionsStreamingJSON ModeCodeReasoningTool Use
Documentation
https://api.openai.com/v1/chat/completionsEvaluation Scores(2 benchmarks)
HumanEval
97%
SWE-bench Verified
65%
Quick Access
curl pikaainews.com/api/models/openai-gpt-5-3-codexnpx pika-models info openai-gpt-5-3-codexGet API Access
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