Model reference · Synced 2025-04-29
GPT-5 Codex
GPT-5 Codex is an AI model from OpenCode Zen. 400K context window. Capabilities: reasoning, tool calling, multimodal vision. Available on 12 providers. Cheapest listing: $1.07 input / $8.5 output per 1M tokens.
Quick facts
- Cheapest input: $1.07 per 1M tokens (OpenCode Zen)
- Cheapest output: $8.5 per 1M tokens
- Context window: 400K tokens
- Max output: 128K tokens
- Release date: 2025-09-15
- Knowledge cutoff: 2024-09-30
- Capabilities: reasoning, tool calling, multimodal vision
- Provider count: 12
Provider pricing
Same model, different providers, different prices. Cheapest first.
| Provider | Input / 1M | Output / 1M | Context | Listed |
|---|---|---|---|---|
| OpenCode Zen | $1.07 | $8.5 | 400K | 2025-09-15 |
| Poe | $1.1 | $9 | 400K | 2025-09-23 |
| Jiekou.AI | $1.13 | $9 | 400K | 2026-01 |
| Abacus | $1.25 | $10 | 400K | 2025-09-15 |
| OpenRouter | $1.25 | $10 | 400K | 2025-09-15 |
| ZenMux | $1.25 | $10 | 400K | 2025-09-23 |
| Azure Cognitive Services | $1.25 | $10 | 400K | 2025-09-15 |
| OpenAI | $1.25 | $10 | 400K | 2025-09-15 |
| Requesty | $1.25 | $10 | 400K | 2025-09-15 |
| Vercel AI Gateway | $1.25 | $10 | 400K | 2025-09-15 |
| Azure | $1.25 | $10 | 400K | 2025-09-15 |
| NanoGPT | $10 | $19.99 | 256K | 2025-09-15 |
Prices synced daily from models.dev + provider docs.
How to use this model
If you're picking GPT-5 Codex for a project, the three things that matter most:
- Compare it side-by-side with one or two alternatives in the live comparison tool. Pricing differences matter more than benchmarks at scale.
- Pick the cheapest provider that meets your latency / SLA need. Big spread across providers for the same weights.
- Re-evaluate every 3 months. Frontier prices drop fast; a model that's cheapest today may not be in a quarter.
Related models
FAQ
How much does GPT-5 Codex cost? $1.07 input / $8.5 output per 1M tokens at the cheapest listing. See the table above for other providers.
What is the context window? 400K tokens.
Which providers offer it? NanoGPT, Abacus, OpenRouter, Jiekou.AI, ZenMux, OpenCode Zen, Poe, Azure Cognitive Services, OpenAI, Requesty, and others — see the full table above.
Where do these numbers come from? models.dev + provider documentation, synced daily. About the data.