AI pricing changes — 29 September 2026

11 models changed since 28 September 2026.

Claude Opus 5.5 was added to the index at $4.00 per 1M input and $20.00 per 1M output. price history →
Claude Sonnet 5.5 was added to the index at $2.00 per 1M input and $10.00 per 1M output. price history →
Claude Opus 5: status changed from sota to active. price history →
Claude Sonnet 5: status changed from sota to active. price history →
Grok 4.7 was added to the index at $2.00 per 1M input and $6.00 per 1M output. price history →
Grok 4.6: status changed from sota to active. price history →
GPT-6 Sol was added to the index at $2.00 per 1M input and $10.00 per 1M output. price history →
GPT-6 Luna was added to the index at $0.10 per 1M input and $0.50 per 1M output. price history →
GPT-5.6 Sol: input fell from $5.00 to $4.00 (-20.0%); output fell from $30.00 to $20.00 (-33.3%); cached input fell from $0.50 to $0.40 (-20.0%). price history →
GPT-5.6 Terra: input fell from $2.50 to $2.00 (-20.0%); output fell from $15.00 to $12.00 (-20.0%); cached input fell from $0.25 to $0.20 (-20.0%). price history →
GPT-5.6 Luna: input fell from $1.00 to $0.20 (-80.0%); output fell from $6.00 to $1.20 (-80.0%); cached input fell from $0.10 to $0.02 (-80.0%). price history →

Figures are captured from provider pricing pages once daily at 06:00 UTC. Cite as: YemHub AI Pricing Index, 29 September 2026.