Google shuts down Gemini 2.5 Pro (gemini-2.5-pro) and Gemini 2.5 Flash (gemini-2.5-flash) on the Gemini API on December 1, 2026. Both can be used until that date. After the shutdown, requests that still name gemini-2.5-pro are answered by a different model, gemini-3.8-flash, billed at Gemini 3.8 Flash rates, and requests that still name gemini-2.5-flash are answered by gemini-3.5-flash-lite, billed at Gemini 3.5 Flash-Lite rates. Google deprecated both on 2026-11-02 and lists breaking API changes in a migration guide for each replacement. Gemini 2.5 Flash-Lite (gemini-2.5-flash-lite) is not deprecated. The Gemini API keeps running.
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Cloudflare AI Search usage is not charged until December 1, 2026, when usage-based billing begins. Every account receives 5 million ingestion tokens, 10 GB-month of storage, 1,000 semantic queries and 1,000 full-text queries each month. Usage beyond these amounts is billed at $0.75 per million ingestion tokens, $2.00 per GB-month of storage, $0.75 per 1,000 semantic queries and $0.10 per 1,000 full-text queries. Cloudflare first set the start for November 1, 2026 and moved it on November 2, 2026.
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Gemini 4 Argon on the Gemini API has introductory pricing through November 30, 2026. Standard input is $2.00 per million tokens through November 30, 2026, then $4.00 from December 1, 2026. Output is $10.00 then $20.00. Batch and Flex input is $1.00 then $2.00, output $5.00 then $10.00. Priority input is $3.60 then $7.20, output $18.00 then $36.00. It is not available on the Free tier.
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Firebase Spark projects that enabled Remote Config before September 1, 2026 can use it under the old terms until December 1, 2026. From December 1, 2026, the 100,000-fetches-a-day limit applies to them, with 30 days of full service from the first day they go over, then throttling unless they upgrade to Blaze. A Spark project that upgrades to Blaze before November 15, 2026 is not billed for Remote Config until February 1, 2027. Blaze projects from before September 1, 2026 start Remote Config billing on February 1, 2027.
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Gemini 4 Carbon (gemini-4-carbon), generally available on the Gemini API since November 10, 2026, has introductory pricing through November 30, 2026. Standard input is $2.00 per million tokens through November 30, 2026, then $4.00 from December 1, 2026. Output is $10.00 then $20.00. Batch and Flex input is $1.00 then $2.00, output $5.00 then $10.00. Priority input is $3.60 then $7.20, output $18.00 then $36.00. It is not available on the Free tier.
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Claude Sonnet 4.5 (claude-sonnet-4-5-20250929) retires from the Claude API on 2026-11-30, and requests to it fail after that date. Anthropic deprecated it on 2026-09-30 and names claude-sonnet-5-5 as the replacement. The Claude API and Anthropic's other models keep running. Amazon Bedrock and Google Cloud set their own retirement dates.
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