GPT-5.3 Codex pricing & specs
OpenAI · released 2026-02-05 · ● verified 2026-10-11
input / 1M$1.75
output / 1M$14.00
context400K
max output128K
// price history ($/1M tokens)
// cheaper or similar alternatives
| model | in | out | ctx | vs GPT-5.3 Codex |
|---|---|---|---|---|
| Gemini 2.5 Flash-Lite | $0.10 | $0.40 | 1.05M | −96.4% |
| Claude Haiku 5.5 | $0.10 | $0.50 | 1M | −95.8% |
| GPT-6 Luna | $0.10 | $0.50 | 1.05M | −95.8% |
| GLM-5.3-Flash | $0.15 | $0.50 | 1M | −95.1% |
| GPT-5.6 Luna | $0.20 | $1.20 | 1.05M | −90.6% |
// faq
How much does GPT-5.3 Codex cost?
GPT-5.3 Codex costs $1.75 per million input tokens and $14.00 per million output tokens. At 50M input and 10M output tokens per month that is about $228.
What is the context window of GPT-5.3 Codex?
400K tokens, with up to 128K output tokens per request.
Does GPT-5.3 Codex support prompt caching?
Yes. Cached input tokens cost $0.175 per million.
What are cheaper alternatives to GPT-5.3 Codex?
Gemini 2.5 Flash-Lite ($0.10 in / $0.40 out), Claude Haiku 5.5 ($0.10 in / $0.50 out), GPT-6 Luna ($0.10 in / $0.50 out) offer the same input types and capabilities for less.
// spec sheet
- input / 1M
- $1.75
- output / 1M
- $14.00
- cache read / 1M
- $0.175
- blended (3:1)
- $4.8125
- context
- 400K
- max output
- 128K
- input types
- text · image · pdf
- reasoning
- yes
- tool calling
- yes
- structured output
- yes
- open weights
- no
- knowledge cutoff
- 2025-08-31
- price source
- OpenAI
// cost calculator
| model | in $/1M | out $/1M | = monthly |
|---|---|---|---|
| Gemini 2.5 Flash-Lite | $0.10 | $0.40 | $9.00 |
| Claude Haiku 5.5 | $0.10 | $0.50 | $10.00 |
| GPT-6 Luna | $0.10 | $0.50 | $10.00 |
| GPT-5.3 Codex | $1.75 | $14.00 | $228 |
Base-tier list prices. Long-context tiers, caching and batch discounts are not included.