GPT-5.6 Sol API pricing
2 providers serve GPT-5.6 Sol. GPT-5.6 Sol is a proprietary API model, up to 1050K context. Prices below are per 1M tokens, cheapest input first.
Refreshed 2026-07-09 · list prices from provider APIs| Provider | Input $/1M | Output $/1M | Cache read $/1M | Context | |
|---|---|---|---|---|---|
| OpenAI | $5.00 | $30.00output floor | $0.500 | 1050K | Use |
| OpenRoutermarketplace quote | $5.00 | $30.00 | $0.500 | 1050K | Use |
The cheapest way to run GPT-5.6 Sol
On an illustrative 70M-input / 30M-output monthly workload, today's cheapest listed option is OpenAI at roughly $1250/month. Input-heavy, output-heavy and cache-heavy workloads can produce different winners—use the live mix calculator below rather than combining floors from two different providers. It is API-only, so the table above is your full set of options. Run your own numbers in the breakeven calculator, or read the breakeven math.
Your actual monthly cost
Cache read uses the listed cache rate where available; otherwise it falls back to normal input price. Batch, write-cache, volume and negotiated discounts are excluded.
Related models
| Model | Cheapest in $/1M | Cheapest out $/1M | Providers |
|---|---|---|---|
| GPT-OSS 120B | $0.050 | $0.250 | 20 |
| GPT-OSS 20B | $0.015 | $0.070 | 14 |
| GPT-5 | $1.25 | $10.00 | 8 |
| GPT-5 Mini | $0.250 | $1.20 | 7 |
| GPT-5 Nano | $0.050 | $0.400 | 7 |
| GPT-4o | $2.50 | $10.00 | 6 |
FAQ
What is the cheapest API for GPT-5.6 Sol?
As of 2026-07-09, the lowest input price for GPT-5.6 Sol is OpenAI at $5.00 per 1M input tokens. The lowest output price is OpenAI at $30.00 per 1M output tokens. The cheapest provider for a real workload depends on its input/output mix. The next-lowest input price is OpenRouter at $5.00, the same list price.
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