impossibl/openai/gpt-5.3-codex · family gpt-codex · price provider-declared (via models.dev), USD per 1M tokens. Capabilities: toolsreasoningtextimagepdf.
impossibl)“GPT-5.3 Codex” is offered by 9 providers — cheapest-effective first. This one (Impossibl) is the cheapest.
| Provider | Input | Output | Blended | Context |
|---|---|---|---|---|
| Impossibl (this) | $1.75 | $14 | $4.81 | 400k |
| Vivgrid | $1.75 | $14 | $4.81 | 400k |
| FastRouter | $1.75 | $14 | $4.81 | 400k |
| LLM Gateway | $1.75 | $14 | $4.81 | 400k |
| OpenCode Zen | $1.75 | $14 | $4.81 | 400k |
| GitHub Copilot | $1.75 | $14 | $4.81 | 400k |
| Neon | $1.75 | $14 | $4.81 | 400k |
| FrogBot | $1.75 | $14 | $4.81 | 400k |
| Pioneer | $1.75 | $14 | $4.81 | 400k |
jishie indexes & prices models; it does not proxy inference. Most providers are OpenAI-compatible — point base_url at Impossibl 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):