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GPT-4o pricing
The current openai/gpt-4o slug is $2.50 / $10 per million tokens. Older dated snapshots on the same family are not the same rate.
Updated 2026-09-27
| Slug | Input / M | Output / M | Context |
|---|---|---|---|
| openai/gpt-4o | $2.50 | $10 | 128,000 |
| openai/gpt-4o:batch | $1.25 | $5 | 128,000 |
| openai/gpt-4o-2024-05-13 | $5 | $15 | 128,000 |
| openai/gpt-4o-mini | $0.15 | $0.60 | 128,000 |
The card describes GPT-4o as the omni model: image and text in, text out. Cache reads on the main slug were $1.25 per million. Mini is the cheap sibling, not a hidden discount on the full model.
GPT-5.1 is $1.25 / $10 with a 400K window, so it is cheaper on input and equal on output, with more context. Keep gpt-4o when a product is pinned to that id. The May 2024 snapshot costs more. Do not let a library default to gpt-4o-2024-05-13.
Questions
How much is GPT-4o on OpenRouter?
$2.50 per million input tokens and $10 per million output tokens for openai/gpt-4o on 27 Sep 2026.
How much is GPT-4o mini?
$0.15 input and $0.60 output per million tokens.
Is GPT-4o cheaper than GPT-5.1?
On input, no. GPT-5.1 was $1.25. On output, both were $10. GPT-5.1’s context is 400K. GPT-4o’s is 128K.
Related
- GPT-5.1 API
GPT-5.1 on OpenRouter was $1.25 input and $10 output per million tokens on 27 Sep 2026. The slug is openai/gpt-5.1, with a 400K context.
- AI model comparison
A price and context comparison of DeepSeek V4, Qwen3.7 Max, GLM 5.2, Claude Sonnet 5, GPT-5.1, and Grok 4.5 on OpenRouter, checked 27 Sep 2026.
- Claude Haiku vs Sonnet
Haiku 4.5 is $1 / $5 per million tokens with a 200K context. Sonnet 4.5 is $3 / $15 and up to 1M. Sonnet 5 is $2 / $10.
- OpenRouter pricing and credits
OpenRouter credits are a prepaid dollar balance. Buying credits costs 5.5% ($0.80 minimum). Inference uses each provider’s own token price.