Opus: upcoming dates

Recent

• AI09/22/2026@TechDesk

  Claude Opus 5.5 Released

  San Francisco, California, United StatesAnthropic

  

  Starts 09/22/2026CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins90% CONFIDENCEOverall confidence: 90%How well the pin's source and references back up its dates.Weighted average of how firmly 4 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better10 days agoUnlike the Fable 5.1 announcement, this page dates itself: the header reads “Claude^[2] Opus 5.5 September 22, 2026”. TechCrunch's^[3] byline (“9:30 AM PDT · September 22, 2026”, “released on Tuesday”) and XDA's 2026-09-22T16:44Z timestamp agree, so the source^[1] keeps the claim and the two reports corroborate it.

  Anthropic releases Claude Opus 5.5, the first model in a new Claude 5.5 family, which it says matches Claude Fable 5.1 on most work while costing 40% less to run than Opus 5.

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• AI09/28/2026@TechDesk

  Claude Opus 4.1 Released

  San Francisco, California, United StatesAnthropic

  

  Starts 08/05/2025CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins89% CONFIDENCEOverall confidence: 89%How well the pin's source and references back up its dates.Weighted average of how firmly 6 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better1.2 years agoAnthropic's^[1][3] post is dated "Aug 5, 2025": "Today we're releasing Claude^[2][4] Opus 4.1 ... now available to paid Claude users and in Claude Code. It's also on our API, Amazon Bedrock, and Google Cloud's Vertex AI"; the Claude release notes and GitHub's^[5] changelog carry the same date.

  Anthropic releases Claude Opus 4.1, an upgrade to Claude Opus 4 that raises its SWE-bench Verified coding score to 74.5% at the same price, on the day OpenAI released its first open-weight models since 2019.

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• AI09/28/2026@TechDesk

  Claude Opus 4 Released

  San Francisco, California, United StatesAnthropic

  

  Starts 05/22/2025CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins90% CONFIDENCEOverall confidence: 90%How well the pin's source and references back up its dates.Weighted average of how firmly 6 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better1.4 years agoAnthropic's^[1][2][6] post is dated "May 22, 2025": "Today, we're introducing the next generation of Claude^[3] models: Claude Opus 4 and Claude Sonnet 4", "available on our API, Amazon Bedrock, and Google Cloud's Vertex AI"; CNBC^[4] and TechCrunch^[5] report the launch that Thursday.

  Anthropic releases Claude Opus 4, which it calls the world's best coding model at 72.5% on SWE-bench and able to work for hours on end, the first Claude model deployed under its stricter ASL-3 safety protections.

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• AI09/28/2026@TechDesk

  Claude 3 Opus Released

  San Francisco, California, United StatesAnthropic

  

  Starts 03/04/2024CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins90% CONFIDENCEOverall confidence: 90%How well the pin's source and references back up its dates.Weighted average of how firmly 5 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better2.6 years agoAnthropic's^[1][2] post is dated "Mar 4, 2024" and says "Opus and Sonnet are now available to use in claude^[3].ai and the Claude API which is now generally available in 159 countries"; CNBC^[4] and TechCrunch^[5] report the launch the same Monday.

  Anthropic releases Claude 3 Opus, the most capable of its new Claude 3 models, which it says beats GPT-4 and Gemini 1.0 Ultra on most common benchmarks and brings image understanding to Claude for the first time.

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