OpenAI GPT-5.3 Codex: API pricing, providers and specs
OpenAI GPT-5.3 Codex is a text model by OpenAI. 21 providers serve it, from $11.20 to $29.62 /1M; the lowest price is at APIMart.
How OpenAI GPT-5.3 Codex compares
Against the 737 text models on the site priced the same way.
- Pricey for its class: at $11.20 /1M, its lowest price is above 89% of comparable models (median $1.10).
- Its 400K-token context window is larger than 62% of them (median 262K), about 600 pages of text.
- On LMArena's WebDev board it ranks #60 of the 64 comparable models scored there.
- 21 providers serve it; 89% of comparable models have fewer.
OpenAI GPT-5.3 Codex prices by provider
Every provider's list price, read from its own price page or API. A price marked “from” changes with context length, resolution or mode.
| Provider | Input | Output | Prompt caching | Context |
|---|---|---|---|---|
| APIMart | $1.40/1M | $11.20/1M | — | — |
 CometAPI | $1.40/1M | $11.20/1M | $0.14/1M | — |
 Poe | $1.59/1M | $12.73/1M | $0.159/1M | 400K |
 Jiekou.AI | $1.66/1M | $13.30/1M | $0.166/1M | — |
| ZenMux | $1.75/1M | $14/1M | $0.175/1M | 400K |
 Requesty | $1.75/1M | From$14/1M | $0.175/1M | 400K |
 Ofox | $1.75/1M | $14/1M | $0.18/1M | 512K |
 Venice AI | $1.75/1M | $14/1M | $0.175/1M | — |
| OpenCode | $1.75/1M | $14/1M | $0.175/1M | — |
 FastRouter | $1.75/1M | $14/1M | $0.175/1M | 400K |
 DigitalOcean | $1.75/1M | $14/1M | $0.175/1M | — |
 OrcaRouter | $1.75/1M | $14/1M | $0.175/1M | 400K |
| Vercel AI Gateway | $1.75/1M | From$14/1M | $0.175/1M | 400K |
 Prime Inference | $1.75/1M | $14/1M | — | — |
 AIHubMix | $1.75/1M | $14/1M | $0.175/1M | 400K |
 Impossibl | $1.75/1M | $14/1M | $0.175/1M | — |
| OpenRouter | $1.75/1M | From$14/1M | $0.175/1M | 400K |
| DevPass (LLM Gateway) | $1.75/1M | From$14/1M | $0.175/1M | — |
 CrazyRouter | $1.75/1M | $14/1M | — | — |
 Azure | $1.75/1M | From$14/1M | $0.175/1M | — |
| AI/ML API | $3.70/1M | $29.62/1M | $0.37/1M | — |
- APIMart$11.20
- CometAPI$11.20
- Poe$12.73
- Jiekou.AI$13.30
- ZenMux$14
- Ofox$14
- Venice AI$14
- OpenCode$14
- FastRouter$14
- DigitalOcean$14
- OrcaRouter$14
- Prime Inference$14
Specs
- Type
- Text
- Maker
- OpenAI
- Inputs
- Image, Text
- Outputs
- Text
- Context
- 400K≈ 600 pages of text
- Max output
- 128K
- Capabilities
- Prompt caching, JSON, Reasoning, Tool calling, Vision
- Released
- Feb 5, 2026
- License
- —
- Open weights
- —
- Arena score
- 1371WebDev
Alternatives to OpenAI GPT-5.3 Codex
Same kind of model from other makers, at a similar price.
| Model | Lowest price | Context | Arena | Providers |
|---|---|---|---|---|
| OpenAI GPT-5.3 Codexthis model | $11.20/1M | 400K | 1371 | 21 |
 Gemini 4 Argon | $8/1M | 1.05M | 1673 | 26 |
| Kimi K3 | $8.28/1M | 1.05M | 1655 | 47 |
 Muse Wonder | $16/1M | 1.05M | — | 14 |
| Claude Opus 5.5 | $16/1M | 1M | 1807 | 33 |
 Qwen3.8 2.4T A95B | $4.11/1M | 1M | — | 22 |
| Grok 4.7 | $4.80/1M | 500K | 1637 | 28 |
| Muse Spark 1.3 | $4.25/1M | 1.05M | 1657 | 11 |
| Claude Sonnet 5.5 | $8/1M | 1M | 1767 | 32 |
More from OpenAI
OpenAI GPT-5.3 Codex FAQ
The lowest price for OpenAI GPT-5.3 Codex is $11.20 /1M, at APIMart.
APIMart, at $11.20 /1M. 21 providers serve OpenAI GPT-5.3 Codex; the table above lists every one with its price.
OpenAI GPT-5.3 Codex reads up to 400K tokens per request and writes up to 128K.
We have not found OpenAI GPT-5.3 Codex's weights published by its maker.
21 API providers serve OpenAI GPT-5.3 Codex. Compare their prices above, or open a provider to see everything it offers.
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