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OpenAI: GPT-5 Codex is a chat model built by OpenAI. It accepts up to 400K tokens of context per request. Routed through external models — ~4,078 tokens per message (50% markup over upstream cost).
Tumia kupitia API
curl https://api.free.ai/v1/chat/ \
-H "Authorization: Bearer YOUR_KEY" \
-d '{"model":"openai/gpt-5-codex"}'
Linganisha
FAQ
OpenAI: GPT-5 Codex is a chat model built by OpenAI. It accepts up to 400K tokens of context per request. Routed through external models — ~4,078 tokens per message (50% markup over upstream cost).
OpenAI: GPT-5 Codex works well for general conversation, writing assistance, brainstorming, code help, and analysis. Try the sample prompts above to see its style.
About 4,078 tokens per average message. $1 buys 750,000 tokens, so even paid models cost cents per chat. Free accounts get 10,000 signup tokens plus a daily pool.
It depends on the task. /chat/compare/ lets you send the same prompt to OpenAI: GPT-5 Codex and any other model side-by-side — comparison is the fastest way to decide.
Yes. Outputs are yours — Free.ai does not claim rights to anything you generate.
400,000 tokens.
Replies stream token-by-token within ~1 second. Total response time depends on length and model size — small models stream faster, frontier models trade speed for depth.
Yes. Signed-in users see every chat in /account/?tab=history. You can also share a one-link copy of any conversation via the Share button.
Free.ai does not train models on your conversations. Self-hosted models stay on our GPUs. Premium models route to the upstream provider for inference.
Yes. POST to /v1/chat/ with model="openai/gpt-5-codex" and a messages array. Streaming SSE is supported. Full reference: /api/.
OpenAI: GPT-5 Codex is a premium model served by an external provider, so self-hosting is not available. Free.ai exposes it through token-based pricing.
Free accounts get 10,000 signup tokens plus a daily pool. When that runs out, top up starting at $1 (750K tokens) — no subscription required.