GPT-5.3-Codex pricing & benchmarks
Released Feb 24, 2026 · served by 2 providers
What GPT-5.3-Codex is
GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional knowledge capabilities of GPT-5.2. It achieves state-of-the-art results...
- Model ID:
openai/gpt-5.3-codex - Modality: text+image+file->text
- Tool calling: supported · Structured output: supported
Providers and prices for GPT-5.3-Codex
The same model costs different amounts depending on who serves it. Prices are per 1M tokens, cheapest first. Uptime and throughput are OpenRouter's rolling measurements, not vendor claims.
| Provider | Input | Output | Context | Quant | Uptime 24h | Throughput |
|---|---|---|---|---|---|---|
| Azurecheapest | $1.75 | $14.00 | 400K | — | 100.0% | — |
| OpenAI | $3.50 | $28.00 | 400K | — | 99.7% | — |
GPT-5.3-Codex benchmark results
Design Arena head-to-head results, as reported through the OpenRouter model API.
| Category | Arena | Rank | Elo | Win rate |
|---|---|---|---|---|
| godotgamedev | agents | #24 | 1124 | 45.1% |
| androidnative | agents | #25 | 1084 | 35.2% |
| asciiart | models | #26 | 1189 | 51.2% |
| mobileapps | agents | #28 | 1129 | 41.3% |
| webapps | agents | #31 | 1100 | 38.7% |
| fullstack | agents | #32 | 1031 | 36.4% |
| svg | models | #38 | 1179 | 54% |
| gamedev | models | #44 | 1218 | 51.3% |
| dataviz | models | #54 | 1193 | 50.5% |
| uicomponent | models | #60 | 1174 | 47.3% |
| website | models | #60 | 1187 | 48.6% |
| codecategories | models | #61 | 1175 | 47.2% |
| 3d | models | #86 | 1065 | 35.3% |
FAQ
How much does the GPT-5.3-Codex API cost?
$1.75 per 1M input tokens and $14.00 per 1M output tokens. A typical workload of 1M input + 300K output tokens costs about $5.95.
Is GPT-5.3-Codex free?
No. It is a paid model starting at $1.75 per 1M input tokens, though some providers offer trial credits.
Which provider is cheapest for GPT-5.3-Codex?
Azure at $1.75 input / $14.00 output per 1M tokens.
Can I self-host GPT-5.3-Codex?
No. GPT-5.3-Codex is closed-weight and only available through hosted APIs.