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Anthropic timeline

Every model launch, feature release, outage, usage-limit change and price move we have tracked, newest first. Each links to its sources.

Models, 90 days1Confirmed launches
Features, 90 days5Products and updates
Incidents, 90 days29From status pages and reports
Limits and pricing1Changes in 90 days

Model lineup

Every Anthropic model in our catalogue, newest first, with context and list price per million tokens (input / output). Compare all prices

Sep 2026Claude Opus 5.5Flagship · 1M ctx$4.00 / $20.00
Sep 2026Claude Fable 5.1Frontier · 1M ctx$10.00 / $50.00
Jul 2026Claude Opus 5Flagship · 1M ctx$5.00 / $25.00
Jun 2026Claude Fable 5Frontier · 1M ctx$10.00 / $50.00
Jun 2026Claude Mythos 5Enterprise · 1M ctx$10.00 / $50.00
Jun 2026Claude Sonnet 5Balanced · 1M ctx$2.00 / $10.00
May 2026Claude Opus 4.8Flagship · 1M ctx$5.00 / $25.00
Apr 2026Claude Opus 4.7Legacy · 1M ctx$5.00 / $25.00Retired
Feb 2026Claude Opus 4.6Legacy · 1M ctx$5.00 / $25.00Retired
Feb 2026Claude Sonnet 4.6Legacy · 1M ctx$3.00 / $15.00Retired
Nov 2025Claude Opus 4.5Legacy · 200K ctx$5.00 / $25.00Retired
Oct 2025Claude Haiku 4.5Efficient · 200K ctx$1.00 / $5.00
Sep 2025Claude Sonnet 4.5Legacy · 200K ctx$3.00 / $15.00Retired
Aug 2025Claude Opus 4.1Legacy · 200K ctx$15.00 / $75.00Retired
Oct 2024Claude Haiku 3.5Legacy · 200K ctx$0.80 / $4.00Retired

Timeline

Milestones first. Minor items (small updates, brief status-page incidents, posts without news) are one tap away.

September 2026

  1. 23 Sep
    Anthropic launches Claude Marketplace for partner plugins and agentsFeatures · New product or feature
  2. 22 Sep
    Anthropic publishes task cost details for Opus 5.5Features · Product update
  3. month
    Claude Opus 5.5 releasedFlagship · 1M context · $4.00 in / $20.00 out per 1M
  4. month
    Claude Fable 5.1 releasedFrontier · 1M context · $10.00 in / $50.00 out per 1M

August 2026

  1. 20 Aug
    Anthropic resolves elevated errors on requests to multiple modelsOutages and incidents · Major outage
  2. 20 Aug
    Anthropic resolves elevated errors on Google connectorsOutages and incidents · Minor service incident
  3. 19 Aug
    Anthropic resolves degraded performance for Claude Opus 5 and Haiku 4.5Outages and incidents · Minor service incident
  4. 18 Aug
    Anthropic extends higher Claude Code weekly limits through August 31Limits and pricing · Usage limits raised
  5. 18 Aug
    Claude Opus 5 performance issue resolved after outageOutages and incidents · Minor service incident
  6. 17 Aug
    Anthropic annualized revenue reaches $65BMoney and policy · Round of $1B+ or valuation of $20B+
  7. 17 Aug
    Anthropic resolves degraded performance for Claude Opus 5 and Sonnet 5Outages and incidents · Minor service incident
  8. 16 Aug
    Claude services disruption resolved after 36 minutesOutages and incidents · Major outage of an hour or more
  9. 15 Aug
    Claude Fable 5 errors resolved after outageOutages and incidents · Major outage
  10. 14 Aug
    Anthropic details unreleased Model 2 in AI risk reportResearch · Research release
  11. 14 Aug
    Claude API, Code and Cowork disruption resolvedOutages and incidents · Major outage of an hour or more
  12. 14 Aug
    Claude Code on the web hit by brief service disruptionOutages and incidents · Minor service incident
  13. 13 Aug
    Anthropic resolves elevated errors affecting Claude modelsOutages and incidents · Major outage of an hour or more
  14. 12 Aug
    Anthropic adds watermarks to Claude outputs, users complainFeatures · Product update
  15. 12 Aug
    Anthropic resolves degraded performance across multiple Claude modelsOutages and incidents · Minor service incident
  16. 12 Aug
    Anthropic hires Robert Mahari to lead Claude for LegalFeatures · Product update
  17. 11 Aug
    Anthropic prepares IPO amid investor skepticismMoney and policy · Round of $1B+ or valuation of $20B+
  18. 11 Aug
    Anthropic watermarks all Claude outputs globallyMoney and policy · Policy or regulatory step
  19. 8 Aug
    Anthropic makes Auto Mode default in Claude CodeFeatures · Product update
  20. 8 Aug
    Study finds AI agents use far more energy than chat promptsResearch · Research release
  21. 5 Aug
    Claude Opus 5 performance degraded for 43 minutesOutages and incidents · Minor service incident
  22. 5 Aug
    Anthropic resolves degraded performance incident affecting multiple modelsOutages and incidents · Minor service incident
  23. 4 Aug
    Anthropic resolves elevated errors across many Claude modelsOutages and incidents · Major outage of an hour or more
  24. 4 Aug
    Anthropic resolves elevated errors on Claude Sonnet 5Outages and incidents · Minor service incident
  25. 4 Aug
    Anthropic resolves elevated errors on Claude Sonnet 5Outages and incidents · Minor service incident
  26. 3 Aug
    Claude Sonnet 5 error rates return to baseline after brief incidentOutages and incidents · Minor service incident
  27. 3 Aug
    Anthropic resolves error rate incident across multiple modelsOutages and incidents · Minor service incident

July 2026

  1. 31 Jul
    Anthropic says Claude models attacked real systems in testsOutages and incidents · Security incident
  2. 31 Jul
    Claude Sonnet 5 performance degraded for 47 minutesOutages and incidents · Minor service incident
  3. 30 Jul
    Anthropic resolves degraded performance on Claude Opus 4.8Outages and incidents · Minor service incident
  4. 30 Jul
    Anthropic resolves elevated errors across many Claude modelsOutages and incidents · Major outage of an hour or more
  5. 29 Jul
    Anthropic resolves elevated errors across all Claude modelsOutages and incidents · Major outage of an hour or more
  6. 27 Jul
    Anthropic reports elevated errors on Claude Opus 5 and Haiku 4.5Outages and incidents · Minor service incident
  7. 27 Jul
    Anthropic reports elevated errors on Claude Opus 5, now resolvedOutages and incidents · Minor service incident
  8. 27 Jul
    Anthropic reports elevated errors on Claude Opus 5Outages and incidents · Minor service incident
  9. 26 Jul
    Anthropic resolves elevated errors affecting Opus 5Outages and incidents · Major outage of an hour or more
  10. 25 Jul
    Anthropic resolves elevated errors affecting Claude modelsOutages and incidents · Major outage
  11. 25 Jul
    Anthropic resolves elevated errors affecting several Claude modelsOutages and incidents · Major outage of an hour or more
  12. 25 Jul
    Anthropic releases Claude Opus 5, tops Artificial Analysis Intelligence IndexModels · New model generation from a lab · 1M context · $5.00 in / $25.00 out per 1M

June 2026

  1. month
    Claude Fable 5 releasedFrontier · 1M context · $10.00 in / $50.00 out per 1M
  2. month
    Claude Mythos 5 releasedEnterprise · 1M context · $10.00 in / $50.00 out per 1M
  3. month
    Claude Sonnet 5 releasedBalanced · 1M context · $2.00 in / $10.00 out per 1M

May 2026

  1. month
    Claude Opus 4.8 releasedFlagship · 1M context · $5.00 in / $25.00 out per 1M

April 2026

  1. month
    Claude Opus 4.7 releasedLegacy · 1M context · $5.00 in / $25.00 out per 1M · retired

February 2026

  1. month
    Claude Opus 4.6 releasedLegacy · 1M context · $5.00 in / $25.00 out per 1M · retired
  2. month
    Claude Sonnet 4.6 releasedLegacy · 1M context · $3.00 in / $15.00 out per 1M · retired

November 2025

  1. month
    Claude Opus 4.5 releasedLegacy · 200K context · $5.00 in / $25.00 out per 1M · retired

October 2025

  1. month
    Claude Haiku 4.5 releasedEfficient · 200K context · $1.00 in / $5.00 out per 1M

September 2025

  1. month
    Claude Sonnet 4.5 releasedLegacy · 200K context · $3.00 in / $15.00 out per 1M · retired

August 2025

  1. month
    Claude Opus 4.1 releasedLegacy · 200K context · $15.00 in / $75.00 out per 1M · retired

October 2024

  1. month
    Claude Haiku 3.5 releasedLegacy · 200K context · $0.80 in / $4.00 out per 1M · retired

Stories come from the Wire from July 2026 on; earlier model releases come from our catalogue and are dated to the month. Anthropic on the Vikshy Score