← All pricing changes

AI pricing changes — 6 September 2026

8 models changed since 5 September 2026.

• Claude Fable 5.1 was added to the index at $10.00 per 1M input and $50.00 per 1M output. price history →
• Claude Mythos 5.1 was added to the index at $10.00 per 1M input and $50.00 per 1M output. price history →
• Claude Fable 5: status changed from sota to active. price history →
• Gemini 3.8 Flash was added to the index at $0.75 per 1M input and $3.75 per 1M output. price history →
• Muse Spark 1.3 was added to the index at $1.25 per 1M input and $4.25 per 1M output. price history →
• Grok 4.6 was added to the index at $2.00 per 1M input and $6.00 per 1M output. price history →
• Grok 4.5: status changed from sota to active. price history →
• GPT-6 Astra was added to the index at $10.00 per 1M input and $50.00 per 1M output. price history →

Figures are captured from provider pricing pages once daily at 06:00 UTC. Cite as: YemHub AI Pricing Index, 6 September 2026.