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GPT-5.3 Codex

OpenAI

Official information

Release date
Feb 5, 2026
Official model ID
gpt-5.3-codex
Vendor source
GPT-5.3 Codex
Identity verified
Aug 13, 2026

API pricing

Verification
Retained last valid price
Verified at
Aug 13, 2026, 08:00:00 GMT+8
Value benchmark tier
Fixed USD rate
Input / output per million tokens
Tier / regionInput / output · per MTokContext pricing tierBillingValiditySource
Fixed USD rate$1.75 / $14—PAYG—Official rates

Rankings by category

Overall

#11Medium 0.57
72.4
Overall — Source breakdown
SourcePercentileRaw scoreConfig folding
Epoch AI72.4157.1Single config

Coding

#55Medium 0.54
3.2
Coding — Source breakdown
SourcePercentileRaw scoreConfig folding
LMArena3.21406.6Single config

Value

#17Medium 0.57
45.7

Aliases & configurations

  • gpt-5-3-codex
  • gpt-5-3-codex-codex-harness· codex harness

Methodology & data sources