GPT 5.3 Codex
vercel/openai/gpt-5.3-codex · family gpt-codex · in: text, image, pdf → out: text · price provider-declared (via models.dev). Capabilities: tools reasoning text image pdf.
$4.81
Blended $/1M (3:1)
$1.75
Input $/1M
$14
Output $/1M
$15.75
1M in + 1M out
$0.175 −90%
Cache read $/1M
#6486 of 7,708
Cheapest rank
- Provider
- Vercel AI Gateway (
vercel) - Kind
- text (outputs text)
- Context
- 400,000 tokens
- Max output
- 128,000 tokens
- Capabilities
- tools reasoning text image pdf
Same model, other providers
“GPT 5.3 Codex” is offered by 2 providers — cheapest-effective first. This one (Vercel AI Gateway) is the cheapest.
| Provider | Input | Output | Blended | Context |
|---|---|---|---|---|
| Vercel AI Gateway (this) | $1.75 | $14 | $4.81 | 400k |
| NanoGPT | $1.75 | $14 | $4.81 | 400k |
Call it
jishie indexes & prices models; it does not proxy inference.
Most providers are OpenAI-compatible — point base_url at Vercel AI Gateway and pass this model id:
curl $BASE_URL/v1/chat/completions \
-H "Authorization: Bearer $API_KEY" -H "Content-Type: application/json" \
-d '{"model":"openai/gpt-5.3-codex","messages":[{"role":"user","content":"hello"}]}'
Route programmatically with MCP find_model / get_model, or fetch this record free (no wallet):