OpenAI · flagship
OpenAI GPT-5.6 Sol: API pricing 2026
Current OpenAI flagship. The GPT-5.6 family (Sol / Terra / Luna) went GA 9 July 2026 with a 1M-token context window across all three tiers; Sol is the top reasoning / coding / agentic tier at $5/$30 and was left unchanged in OpenAI's 30 July 2026 price cut. Cached input bills at 10% of standard; the Batch API halves both directions. (openai.com/api/pricing blocks automated fetch; rate confirmed via OpenAI's 30 July 2026 pricing announcement and its coverage.)
Input $/M tokens
$5.00
Output $/M tokens
$30.00
Cost / task
$0.0450
3k in + 1k out
Tier
flagship
OpenAI
Cost at common task volumes
| 1,000 tasks / yr | $45.00 |
| 10,000 tasks / yr | $450 |
| 100,000 tasks / yr | $4,500 |
| 1,000,000 tasks / yr | $45,000 |
Token shape: 3,000 input + 1,000 output per task. No prompt caching. Real cost varies with your actual prompt shape.
Source
↗ https://openai.com/api/pricingVerified 2026-09-15.
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