GPT-5.2 Codex vs GPT-5.3 Codex
GPT-5.2 Codex and GPT-5.3 Codex are closely matched at 34.6 and 36.8 on the LLM Stats Score. GPT-5.2 Codex and GPT-5.3 Codex cost the same.
OpenAI · OpenAI · Updated for 2026
Which is better?
GPT-5.2 Codex and GPT-5.3 Codex are closely matched on the overall LLM Stats Score at 34.6 and 36.8.
In the 3 individual benchmarks reported for both models, GPT-5.3 Codex wins 2; this is a narrower head-to-head signal than the composite indexes.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose GPT-5.2 Codex
- you want predictable pricing at $1.75/M input and $14.00/M output
Choose GPT-5.3 Codex
- you value its reported benchmark strengths — it wins 2 of 3 exact shared results
- you want the most recent training data — it shipped Feb 2026
At a glance
The differences that matter most.
Individual benchmarks
3 reported for GPT-5.2 Codex · 6 for GPT-5.3 Codex
GPT-5.2 Codex outperforms in 1 benchmarks (LiveBench), while GPT-5.3 Codex is better at 2 benchmarks (SWE-Bench Pro, Terminal-Bench 2.0).
GPT-5.3 Codex shows notably better performance in the majority of benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-5.2 Codex ($1.75/1M tokens) costs the same as GPT-5.3 Codex ($1.75/1M tokens).
For output processing, GPT-5.2 Codex ($14.00/1M tokens) costs the same as GPT-5.3 Codex ($14.00/1M tokens).
In conclusion, GPT-5.2 Codex and GPT-5.3 Codex cost the same.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Both models have the same input context window of 400,000 tokens. Both models can generate responses up to 128,000 tokens.
Input capabilities
Documented input modalities across available providers
Both GPT-5.2 Codex and GPT-5.3 Codex support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
GPT-5.2 Codex
GPT-5.3 Codex
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
GPT-5.2 Codex was released on 2026-01-14, while GPT-5.3 Codex was released on 2026-02-05.
GPT-5.3 Codex is 1 month newer than GPT-5.2 Codex.
Jan 14, 2026
7 months ago
Feb 5, 2026
6 months ago
3w newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
GPT-5.2 Codex is available from OpenAI. GPT-5.3 Codex is available from OpenAI.
GPT-5.2 Codex
GPT-5.3 Codex
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-5.2 Codex and GPT-5.3 Codex side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-5.2 Codex vs GPT-5.3 Codex.