OpenAI cuts GPT-5.6 Luna price 80% and Terra 20%
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.
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.
Changelog
- 2026-09-29: added post link(s) (OpenAI cluster post research)
- 2026-09-29: created
Related posts (2)
- Altman: 'major price cuts today' for GPT-5.6 Luna and Terra Sam Altman @sama · x · 2026-07-30
Altman announces an 80% price cut for GPT-5.6 Luna and a Fast mode for Sol. - OpenAI OpenAI @OpenAI · x · 2026-07-30
Cited as a source by: 2026-07-30-gpt-5-6-price-cut
Related events
- OpenAI broadly releases GPT-5.6 (Sol, Terra, Luna) after government-gated preview ★★★★
- OpenAI launches GPT-6 Sol and GPT-6 Luna at half the price of GPT-5.6 ★★★★
- OpenAI adds a $500/month Pro 500 plan and the Ultrafast speed tier, and halves the $200 Pro allowance ★★★
Sources (6)
- officialAdvancing the price-performance frontier with GPT-5.6 (OpenAI)
- pressCNBC: OpenAI cuts prices for two of its GPT-5.6 AI models
- pressYahoo Finance: OpenAI cuts GPT-5.6 Luna and Terra prices by up to 80%
- docsCloudZero: GPT-5.6 pricing
- officialSam Altman on X: 'major price cuts today'
- officialOpenAI on X: GPT-5.6 Luna and Terra price reductions
id: 2026-07-30-gpt-5-6-price-cut · updated 2026-09-29 · open in the interactive timeline