AI summarized from verified sources
Use high-performance models more cheaply and faster
Lets you lower AI costs without giving up quality.
SOURCE CHECK
3 sources
Sources
Key Points
- 1Luna is 80% cheaper
- 2Terra is 20% cheaper
- 3Fast mode added for Sol
- 4Reflected in ChatGPT Work and Codex
OpenAI cut prices for GPT-5.6 Luna and Terra and added Fast mode for Sol. The change also carries into ChatGPT Work and Codex, making it easier to run the same work at lower cost.
Key point
OpenAI revised GPT-5.6 pricing and speed. Luna got a major price cut, Terra is cheaper, and Sol now offers Fast mode for quicker use.
Impact
The biggest benefit is for high-volume use cases like support automation and internal workflows. It is a practical update for teams watching costs closely.
What changed
OpenAI cut prices for GPT-5.6 Luna and Terra and added Fast mode for Sol. The change also carries into ChatGPT Work and Codex, making it easier to run the same work at lower cost.
Briefs that include this news
Use daily, weekly, and monthly briefs to understand the surrounding context.
Daily / 2026-09-17
OpenAI clarifies safety disclosure rules, makes ad creation conversational, and Google advances voice and weather AI
Weekly / 2026-09-14 to 2026-09-20
Weekly roundup: AI use cases expanded, while management and safety improvements advanced
Monthly / 2026-09-01 to 2026-09-30
September 2026 AI news roundup: the focus shifts from performance to operations