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GPT-5.3 Codex

OpenAIProprietaryReasoningVerifiedReleased Feb 5, 2026Input: text, image, file
Compare with GLM-5.2Source scores ↗OpenRouter ↗
Overall score
60.5
Rank 54 of 222 · 53.2–67.8
Context window
400K
400,000 tokens
Price per 1M tokens
$1.75 in · $14.00 out
Source: BenchLM
Blended price
$4.81
3:1 input:output tokens
Output speed
—
Not measured yet

Category scores

Scores per capability area with the model's rank among ranked models in that category.

  1. 1Instruction following#1892.6
  2. 2Reasoning82.2
  3. 3Multimodal80.1
  4. 4Knowledge78.2
  5. 5Agentic & tool use71.9
  6. 6Coding#3461.6
Higher is better. #N is the model's rank in that category, where it is eligible to be ranked.

Benchmark results (8)

As reported in system cards, papers and public evaluations. Position compares this model with every other model reporting the same benchmark.

Agentic & tool use

Gert Labs57.47#13 of 52
Terminal-Bench 2.077.3#2 of 39
OSWorld-Verified64.7#26 of 35
JobBench33.7#21 of 34

Coding

SWE-bench Verified85.0#9 of 98
SWE-bench Pro56.8#39 of 69
SWE-Rebench58.2#9 of 13

Multimodal

Design Arena Website1164#70 of 91

Pricing by source

USD per 1M tokens.

SourceInputOutputCached in
List price (BenchLM)$1.75$14.00—
OpenRouter openai/gpt-5.3-codex$1.75$14.00$0.17

OpenAI's GPT-5.3-Codex model page lists GPT-5.3-Codex at $1.75 input / $14.00 output per million tokens.

Arena ratings

Human-preference ratings from LMArena. Best-rated variant shown.

WebDev (coding)(Codex Harness)1407#92 · 2.6K votes

Speed

Measured by us through OpenRouter (median of trials).

Not measured yet.

Related models

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