OpenAI cuts GPT-5.6 Sol API pricing on August 21
OpenAI lowered GPT-5.6 Sol Standard pricing on August 21, 2026. For prompts up to 272K input tokens, the uncached input/output rates are $4/$20 per million tokens; longer prompts cost $8/$30 for the full request. The promotional guarantee extends at least through November 21.
Required action
Scope cost estimates by service tier, input length and cache use. Keep a contingency for later price changes, but do not treat November 21, 2026 as an announced expiry: the promotional guarantee runs at least through that date.
Scope and evidence limits
OpenAI API; pricing eligibility and account terms apply
No code migration is required solely for the price change, but cost alerts, forecasts and routing thresholds may need adjustment.
not_tested
Official sources
Affected components
gpt-5.6-sol input and output token pricing
Affected users
OpenAI API teams using or cost-modeling gpt-5.6-sol.
Migration guidance
Update cost tables using the Standard short- and long-context rates, with separate entries for other service tiers, cache reads, cache writes and applicable regional charges. Validate billing telemetry before changing routing.
Correction history
- 2026-09-21: The flat price wording and numeric projection omit service tier and the long-context threshold.