GPT-5.2 Pro vs GPT-5 Codex
A side-by-side comparison of two multimodal models — real specs, pricing, strengths and weaknesses, and a clear verdict on which to choose. Kept current by our agents.
Quick verdict: which should you choose?
Choose GPT-5.2 Pro if you need
- ✓Choose GPT-5 Codex if you need lower output cost at $10 per 1M tokens.
- ✓Choose GPT-5 Codex if you need documented high output speed of 149.9 t/s.
- ✓Choose GPT-5 Codex if you need strong coding specialization with unified text and image reasoning.
- ✓Choose GPT-5 Codex if you need a published intelligence index of 44.6.
Choose GPT-5 Codex if you need
- ✓Choose GPT-5.2 Pro if you need seamless handling of image, text, and file modalities together.
- ✓Choose GPT-5.2 Pro if you need strong integration for extended multi-turn multimodal tasks.
- ✓Choose GPT-5.2 Pro if you need very large context explicitly suited to detailed multi-input workflows.
Verdict
GPT-5 Codex leads on known metrics with a dramatically lower price ($10 vs $168 per 1M), documented output speed of 149.9 t/s, and an intelligence index of 44.6 plus explicit coding specialization. GPT-5.2 Pro offers broader modality support including files and stronger multi-turn integration but lacks any disclosed performance numbers. Both share identical 400k context and OpenAI proprietary status, making Codex the clearer value for speed and cost while Pro targets users needing file-inclusive workflows.
GPT-5.2 Pro vs GPT-5 Codex: side by side
| Spec | GPT-5.2 Pro | GPT-5 Codex | Winner |
|---|---|---|---|
| Intelligence | — | 44.6 | Tie |
| Output speed | — | 150 t/s | Tie |
| Output price | $168.00/1M | $10.00/1M | GPT-5 Codex |
| Context | 400K | 400K | Tie |
| Params | — | — | Tie |
| Type | Proprietary | Proprietary | Tie |
| Provider | OpenAI | OpenAI | Tie |
Detailed analysis
Pricing
Winner: GPT-5 CodexGPT-5 Codex is listed at $10 per 1M output tokens while GPT-5.2 Pro is listed at $168 per 1M. No other cost details are provided for either model.
Speed & Intelligence
Winner: GPT-5 CodexGPT-5 Codex reports output speed of 149.9 t/s and intelligence index of 44.6. GPT-5.2 Pro provides no values for speed or intelligence index.
Modalities & Context
Winner: GPT-5.2 ProGPT-5.2 Pro explicitly supports image, text, and file modalities with strong multi-turn integration. GPT-5 Codex is limited to text and static images but shares the same 400k context window.
Context Handling
Winner: TieBoth models list identical 400k context and note high resource demands at maximum context. No further differentiation on long-input behavior is given.
GPT-5.2 Pro
Pros
- +Very large context window for detailed inputs
- +Seamless handling of image, text, and file modalities
- +Strong integration across multiple input types
- +Suitable for extended multi-turn multimodal tasks
Cons
- –High computational demands for maximum context
- –Potential for reduced precision on very long inputs
- –Limited transparency on internal training data
GPT-5 Codex
Pros
- +Handles extremely large inputs effectively
- +Strong coding specialization
- +Unified text and image reasoning
Cons
- –High resource demands with maximum context
- –Limited to text and static images
- –Potential coherence loss in very long outputs
Summary: GPT-5.2 Pro vs GPT-5 Codex
Select GPT-5 Codex when price, speed, and coding focus matter most. Select GPT-5.2 Pro when file-inclusive multimodal and multi-turn tasks are required. Both remain proprietary OpenAI models with equal context size.
Frequently asked questions
GPT-5 Codex at $10 per 1M output tokens versus GPT-5.2 Pro at $168 per 1M.