GPT-5.4 vs GPT-5.2 Codex Comparison
Comparing GPT-5.4 and GPT-5.2 Codex across benchmarks, pricing, and capabilities.
Performance Benchmarks
Comparative analysis across standard metrics
GPT-5.4 outperforms in 2 benchmarks (SWE-Bench Pro, Terminal-Bench 2.0), while GPT-5.2 Codex is better at 0 benchmarks.
GPT-5.4 significantly outperforms across most benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-5.4 ($2.50/1M tokens) is 1.4x more expensive than GPT-5.2 Codex ($1.75/1M tokens).
For output processing, GPT-5.4 ($15.00/1M tokens) is 1.1x more expensive than GPT-5.2 Codex ($14.00/1M tokens).
In conclusion, GPT-5.4 is more expensive than GPT-5.2 Codex.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-5.4 accepts 1,000,000 input tokens compared to GPT-5.2 Codex's 400,000 tokens. Both models can generate responses up to 128,000 tokens.
Input Capabilities
Supported data types and modalities
Both GPT-5.4 and GPT-5.2 Codex support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
GPT-5.4
GPT-5.2 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-5.4 was released on 2026-03-05, while GPT-5.2 Codex was released on 2026-01-14.
GPT-5.4 is 2 months newer than GPT-5.2 Codex.
Mar 5, 2026
1 weeks ago
1mo newerJan 14, 2026
2 months ago
Knowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
GPT-5.4 is available from OpenAI. GPT-5.2 Codex is available from OpenAI. The availability of providers can affect quality of the model and reliability.
GPT-5.4
GPT-5.2 Codex
Outputs Comparison
Key Takeaways
GPT-5.4
View detailsOpenAI
Detailed Comparison
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