GPT-5.6 Sol API pricing
As of October 22, 2026, OpenAI GPT-5.6 Sol costs $4.00 per million input tokens and $20.00 per million output tokens on OpenAI's own API, with cached input at $0.40 per million.
GPT-5.6 Sol benchmarks and specs · Every OpenAI model's price
- Input, per million tokens$4.00
- Output, per million tokens$20.00
- Cached input, per million$0.40
- Context window1.05M tokens
- Max output128K tokens
- Output speedNot measured
What a request costs
Three fixed token mixes at the list price, without cache or batch discounts. For a whole month, use the calculator.
| Workload | Tokens | One request | 1,000 requests | Fits the context window |
|---|---|---|---|---|
| Chat turn | 1K input + 500 output tokens | $0.014 | $14.00 | Yes |
| Repository review | 50K input + 3K output tokens | $0.260 | $260.00 | Yes |
| Agent loop | 200K input + 10K output tokens | $1.00 | $1000.00 | Yes |
| Solved coding task | One SWE-bench Verified attempt, divided by the share that succeed | $1.20 | $1200.00 |
Price history
We have read OpenAI's own price every day since October 21, 2026. It has not changed yet; any change will be listed here with its date.
- October 21, 2026 First recorded: $4.00 input, $20.00 output
Cheaper models as good as GPT-5.6 Sol
Models within two points of GPT-5.6 Sol or above it on the LLMBenchmark Index, with a lower output price. Cheapest first.
GPT-5.6 Sol pricing questions
- How much does GPT-5.6 Sol cost per million tokens?
- $4.00 per million input tokens and $20.00 per million output tokens, as listed on OpenRouter on October 22, 2026.
- Does GPT-5.6 Sol support prompt caching?
- Yes. OpenRouter lists cached input at $0.40 per million tokens, against $4.00 for uncached input.
- Is there a cheaper model as good as GPT-5.6 Sol?
- Gemini 4 Argon scores 84.0 on the LLMBenchmark Index, within two points of GPT-5.6 Sol or above it, and costs $10.00 per million output tokens.
- Has the price of GPT-5.6 Sol changed?
- Not since we started recording it daily on October 21, 2026.