https://ratecardai.pages.dev/changes.htmlDated, sourced changes to published AI API rates.https://platform.openai.com/docs/pricingOpenAI2026-07-30tier renamedMon, 26 Oct 2026 12:00:00 GMT"Priority processing" renamed "Fast mode" (2x standard token price).https://platform.openai.com/docs/pricingOpenAI2026-10-05billing startMon, 26 Oct 2026 12:00:00 GMTBilling for gpt-rosalind-research began ($5.00 in / $25.00 out per 1M tokens).https://platform.openai.com/docs/pricingOpenAI2026-11-21promotion end (earliest)Mon, 26 Oct 2026 12:00:00 GMTGPT-5.6 Sol promotional pricing guaranteed "at least through November 21, 2026" ($4.00 in / $20.00 out).https://ai.google.dev/gemini-api/docs/pricingGoogle2026-12-01scheduled increaseMon, 26 Oct 2026 12:00:00 GMTGemini 4 Argon promotional pricing ends: input $2.00→$4.00, output $10.00→$20.00, cached $0.10→$0.20 per 1M tokens.https://ai.google.dev/gemini-api/docs/pricingGoogle2027-01-01scheduled increaseMon, 26 Oct 2026 12:00:00 GMTGemini 3.8 Flash paid tier: input $0.75→$1.50, output $3.75→$7.50 per 1M tokens. Gemini 3.8 Flash TTS doubles the same day.