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@sama announced an 80% price cut for GPT-5.6 Luna

2026-07-30 · 17:27 UTC ·@sama ·0 min read

Brief

OpenAI (via @sama) cut GPT-5.6 prices and added a speed tier: Luna’s cost falls 80% to $0.20/input and $1.20/output per million tokens; Terra is 20% cheaper at $2/$12 per million; and Sol now has an API Fast mode delivering up to 2.5× throughput for 2× the cost while keeping the same intelligence.

Why it matters

@sama announced an 80% price cut for GPT-5.6 Luna: now $0.20 per million input tokens and $1.20 per million output tokens.

Key details

  • GPT-5.6 Terra got a 20% price reduction to $2 per million input tokens and $12 per million output tokens.
  • GPT-5.6 Sol gains a Fast mode in the API offering up to 2.5x speed for 2x the price with unchanged model intelligence.
Source evidence

major price cuts today:

*80% drop for GPT-5.6 Luna, now $0.20 per million input tokens and $1.20 per million output
*20% drop for GPT-5.6 Terra, to $2/$12
*GPT-5.6 Sol gets Fast mode in the API, up to 2.5x the speed for 2x the price, same intelligence