GPT-5.3-Codex API pricing
As of October 22, 2026, OpenAI GPT-5.3-Codex costs $1.75 per million input tokens and $14.00 per million output tokens on OpenAI's own API, with cached input at $0.175 per million.
GPT-5.3-Codex benchmarks and specs · Every OpenAI model's price
- Input, per million tokens$1.75
- Output, per million tokens$14.00
- Cached input, per million$0.175
- Context window400K tokens
- Max output128K tokens
- Output speed88 tok/s
What a request costs
Three fixed token mixes at the list price, without cache or batch discounts. For a whole month, use the calculator.
| Workload | Tokens | One request | 1,000 requests | Fits the context window |
|---|---|---|---|---|
| Chat turn | 1K input + 500 output tokens | $0.0088 | $8.75 | Yes |
| Repository review | 50K input + 3K output tokens | $0.130 | $129.50 | Yes |
| Agent loop | 200K input + 10K output tokens | $0.490 | $490.00 | Yes |
| Solved coding task | One SWE-bench Verified attempt, divided by the share that succeed | $0.59 | $590.00 |
Price history
We have read OpenAI's own price every day since October 21, 2026. It has not changed yet; any change will be listed here with its date.
- October 21, 2026 First recorded: $1.75 input, $14.00 output
Cheaper models as good as GPT-5.3-Codex
Models within two points of GPT-5.3-Codex or above it on the Vibe Coding Index, with a lower output price. Cheapest first.
- Claude Haiku 5.5$0.50 Coding 70.7 against 60.0 · 96% cheaper output
- DeepSeek V4.1 Flash 1017$0.60 Coding 70.3 against 60.0 · 96% cheaper output
- DeepSeek V4.1 Flash$0.84 Coding 62.5 against 60.0 · 94% cheaper output
- MiMo-V2.6-Pro$0.87 Coding 65.4 against 60.0 · 94% cheaper output
- GPT-5.6 Luna$1.20 Coding 58.0 against 60.0 · 91% cheaper output
GPT-5.3-Codex pricing questions
- How much does GPT-5.3-Codex cost per million tokens?
- $1.75 per million input tokens and $14.00 per million output tokens, as listed on OpenRouter on October 22, 2026.
- Does GPT-5.3-Codex support prompt caching?
- Yes. OpenRouter lists cached input at $0.175 per million tokens, against $1.75 for uncached input.
- Is there a cheaper model as good as GPT-5.3-Codex?
- Claude Haiku 5.5 scores 70.7 on the Vibe Coding Index, within two points of GPT-5.3-Codex or above it, and costs $0.50 per million output tokens.
- Has the price of GPT-5.3-Codex changed?
- Not since we started recording it daily on October 21, 2026.