OpenAI API pricing
Prices per million tokens for the 4 OpenAI models we track, with context windows and what a typical task costs. The cheapest is GPT-6 Luna Pro at $0.100 input and $0.500 output per million tokens; the largest context window is GPT-6 Luna Pro's 1.1M tokens. Updated 25 Oct 2026.
| Model | Input / 1M | Output / 1M | Context | Tools | Reasoning |
|---|---|---|---|---|---|
| GPT-6 Luna Pro | $0.100 | $0.500 | 1.1M | Yes | Yes |
| GPT-6 Luna | $0.100 | $0.500 | 1.1M | Yes | Yes |
| GPT-6.1 Sol Pro | $2.00 | $10.00 | 1.1M | Yes | Yes |
| GPT-6.1 Sol | $2.00 | $10.00 | 1.1M | Yes | Yes |
What OpenAI models cost per task
Using the listed prices, for three common jobs: a chat turn (2,000 tokens in, 500 out), summarising a 100,000-token document into 2,000 tokens, and a long agent run (1 million in, 50,000 out).
- GPT-6 Luna Pro: chat turn $0.0004, document $0.011, agent run $0.125
- GPT-6 Luna: chat turn $0.0004, document $0.011, agent run $0.125
- GPT-6.1 Sol Pro: chat turn $0.0090, document $0.220, agent run $2.50
- GPT-6.1 Sol: chat turn $0.0090, document $0.220, agent run $2.50
How OpenAI compares with other providers
Across all 40 models we track, the cheapest OpenAI model ranks #7 by output price. For a model-by-model comparison, see the full price table or the guide to choosing an LLM.
Other providers: Anthropic pricing · Google pricing · Meta pricing · DeepSeek pricing · Mistral AI pricing · Qwen (Alibaba) pricing · xAI pricing · Moonshot AI pricing · Z.ai pricing
OpenAI in the news
- OpenAI's GPT-6 lands on Google Cloud, next to Gemini and Claude 22 Oct 2026
- Gemini 4 Argon climbs to #5 on Arena's agent board, Opus 5.5 holds #1 15 Oct 2026
- GPT-6.1 Sol Ultrafast: up to 8x faster, at 6x the price 8 Oct 2026
Prices and limits come from OpenRouter's public model catalogue, last synced 25 Oct 2026. OpenAI's own API pricing can differ and changes often; confirm on its pricing page before you commit.
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