OpenAI drops GPT-5.6 Sol to $4/$20 and undercuts Claude Opus 5

verifiedDeveloperFinance

Monday, August 24, 2026

Confidence

High · — vendor primary + two independent trackers verified 08-24

Evidence

OpenAI pricing page + third-party trackers

OpenAI cut its flagship API pricing on GPT-5.6 Sol by more than 20% on Friday, effective for at least three months.

The details

Input $5 to $4; output $30 to $20 per million tokens — 33% output cut.
Promotional rate runs through Nov 21; follows a July 30 Luna and Terra cut.

What it means

Sol now prices below Claude Opus 5 on input and output — the first time OpenAI's top tier is the cheaper flagship. Finance teams that ran build-vs-buy against the $5/$30 sheet should re-run this week.

OpenAI cut its flagship API pricing on GPT-5.6 Sol by more than 20% on Friday, effective for at least three months.

Input $5 to $4; output $30 to $20 per million tokens — 33% output cut.
Promotional rate runs through Nov 21; follows a July 30 Luna and Terra cut.

Sources

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Stat of the Day

$10.2B▲

Alibaba follow-on, Aug 24

The largest primary follow-on ever by a Hong Kong-listed company. 100% of net proceeds earmarked for full-stack AI. Source.

Today’s Take

Three moves, one economics: Alibaba diluted to buy compute, OpenAI cut Sol to defend share on cost, Anthropic hired a chip architect to attack cost at the wafer. The frontier isn't a capability race anymore — it's a race to own the denominator on cost per token. The labs that can't dilute, cut, or design will be paying rent to the ones that can, and enterprise buyers are about to feel that in every renewal cycle this fall. Considered and passed: the Forrester "AI ROI stall" post (framework, no percentage) and Stratechery's agentic-security thesis (analysis, no dated event).

— Agentic desk

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