OpenAI cuts GPT-5.6 Luna price 80% and Terra 20%
Confirmed
The takeaway
Three weeks after launch, OpenAI cut GPT-5.6 Luna API prices by 80% (to $0.20/$1.20 per 1M tokens) and Terra by 20% (to $2/$12), leaving flagship Sol at $5/$30, citing efficiency gains partly achieved with GPT-5.6’s own help optimizing production code.
Status
- Claim
Confirmed
- Our reporting
- High confidence
- Importance
- 2 of 5
- Last verified
- 29 September 2026
Your AI and this story
- GPT-6 Astra91 days after its cutoff
- Claude Opus 5.530 days after its cutoff
- Gemini 4 Hydrogen121 days after its cutoff
- Grok 4.760 days after its cutoff
None of these four assistants can know about it. The closest, Claude Opus 5.5, stops 30 days before it.
Key facts
- Date: July 30, 2026
- Luna: $1/$6 → $0.20/$1.20 per 1M input/output tokens (-80%)
- Terra: $2.50/$15 → $2/$12 per 1M tokens (-20%)
- Sol unchanged at $5/$30 per 1M tokens
- Long-context rates (per pricing guides): Sol $10/$45, Terra $4/$18, Luna $0.40/$1.80
- OpenAI attributed the cuts to efficiency gains, including the model rewriting and optimizing production code
What happened
OpenAI sharply lowered prices on the two cheaper GPT-5.6 tiers while keeping flagship Sol pricing, widening the cheapest-to-most-expensive tier spread from 5x to 25x. Coverage linked the move to cost-sensitive enterprise customers and competition, including from international labs.
Why it matters
Evidence of rapid commoditization of the “utility” tier of frontier-lab models in 2026; it foreshadowed the further 50% cut with GPT-6 Sol/Luna in September.
Caveat: OpenAI’s Sept 22 GPT-6 announcement compared GPT-6 Sol to GPT-5.6 Sol at $4/$20 (“promotional pricing”), which is not reflected in the sources above; exact Sol list price after July may have varied.
Sources
6 sources from 5 sites. Numbers match the chips in the text.
6 sources: 4 primary, 2 press
Primary
- Advancing the price-performance frontier with GPT-5.6 (OpenAI)openai.com, official
- CloudZero: GPT-5.6 pricingcloudzero.com, docs
- Sam Altman on X: ‘major price cuts today’x.com, official
- OpenAI on X: GPT-5.6 Luna and Terra price reductionsx.com, official
Press
- CNBC: OpenAI cuts prices for two of its GPT-5.6 AI modelscnbc.com, press
- Yahoo Finance: OpenAI cuts GPT-5.6 Luna and Terra prices by up to 80%finance.yahoo.com, press
Changes
- Added post link(s)
- Filed