OpenAI: GPT-5.3-Codex
openai/gpt-5.3-codex
GPT-5.3-Codex (OpenAI) ranks #42 of 235 on the TryAii Score while still priced at $1.75/$14 per million input/output tokens — models at its level now sell for about $3.27 per million output tokens. GLM 5.3 Flash matches it for $0.25 per million output tokens. It's strongest on knowledge (#20 on HLE). It's among the fastest models we track, at roughly 53-95 tokens/sec.
Prompt $/1M
$1.750
Completion $/1M
$14.000
Context
400,000 tok
Best provider
126 tok/s · Artificial Analysis
Specs
- Model id
- openai/gpt-5.3-codex
- Display name
- OpenAI: GPT-5.3-Codex
- Modality
- text+image+file->text
- Tokenizer
- GPT
- Instruct type
- —
- Context length
- 400,000
- Max completion
- 128,000
- Prompt $/1M
- $1.750
- Completion $/1M
- $14.000
- Free tier
- no
Capabilities
- Function callingno
- JSON modeno
- System promptno
- Visionno
- Moderatedyes
Benchmark scores
Each axis is one benchmark, normalized to the best model in the field.
No benchmark data for this model.
Speed by provider
| Provider | tok/s |
|---|---|
| Artificial Analysis | 126 |
| OpenAIfastest | 64 |
| Azure | 43 |
Prompt caching by provider
| Provider | Min tokens to cache |
|---|---|
| OpenAI | 1,024 tokens |