western lab · United States
Anthropic
Safety-focused lab behind the Claude model family, known for constitutional AI, interpretability research and enterprise-heavy distribution. Backed by Amazon and Google.
- Founded
- 2021
- Models tracked
- 63
- Valuation
- $183B
- Country
- United States
est. · as of Aug 2026
Founders
Dario Amodei · Daniela Amodei · Tom Brown · Jared Kaplan · Chris Olah
Model Benchmarks
data by
| Model | Released | Intelligence | Coding | GPQA | HLE | SciCode | Terminal-Bench Hard | Tau2 | LCR | IFBench | Speed | TTFT | $/1M in | $/1M out | $/1M blended |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Claude Opus 5.5 (Max, Default Fallback) | 2026-09-22 | 59.1 | — | — | 61.4% | 66.9% | — | — | 84.7% | — | 96.2 t/s | 535.84s | $4 | $20 | $8 |
| Claude Opus 5.5 (Xhigh, Default Fallback) | 2026-09-22 | 57.4 | — | — | 57.5% | 65% | — | — | 84.7% | — | 78.2 t/s | 69.31s | $4 | $20 | $8 |
| Claude Sonnet 5.5 (Max, Default Fallback) | 2026-09-28 | 54.5 | — | — | 55% | 61% | — | — | 82.7% | — | 134.1 t/s | 341.38s | $2 | $10 | $4 |
| Claude Opus 5.5 (High, Default Fallback) | 2026-09-22 | 51.8 | — | — | 55.6% | 60.4% | — | — | 82.7% | — | 69.3 t/s | 18.87s | $4 | $20 | $8 |
| Claude Fable 5.1 (Xhigh, Default Fallback) | 2026-09-01 | 50 | — | 93.4% | 58.7% | 60.9% | — | — | 83% | — | 51.8 t/s | 30.76s | $10 | $50 | $20 |
| Claude Sonnet 5.5 (Xhigh, Default Fallback) | 2026-09-28 | 49.9 | — | — | 50% | 57.3% | — | — | 79.7% | — | 94.7 t/s | 14.54s | $2 | $10 | $4 |
| Claude Fable 5.1 (Max, Default Fallback) | 2026-09-01 | 49.2 | — | 93.7% | 59.1% | 63.1% | — | — | 85.3% | — | 69.2 t/s | 174.59s | $10 | $50 | $20 |
| Claude Opus 5.5 (Medium, Default Fallback) | 2026-09-22 | 48.2 | — | — | 54.7% | 59.3% | — | — | 84.3% | — | 71.6 t/s | 11.65s | $4 | $20 | $8 |
| Claude Fable 5.1 (High, Default Fallback) | 2026-09-01 | 47.2 | — | 90.6% | 55.9% | 58.7% | — | — | 83.7% | — | 50.4 t/s | 8.21s | $10 | $50 | $20 |
| Claude Fable 5.1 (Medium, Default Fallback) | 2026-09-01 | 43.2 | — | 88.6% | 53.8% | 56.4% | — | — | 84.7% | — | 49 t/s | 2.93s | $10 | $50 | $20 |
Indices on Artificial Analysis 0-100 scale · eval scores are raw accuracy · “—” means the metric is not published for that model
Release Timeline
last 48 months- 2026-10-07Anthropic released Claude Haiku 5.5 (Medium).Model ReleaseIntelligence index 24.6
- 2026-09-28Anthropic released Claude Sonnet 5.5 (Medium, Default Fallback).Model ReleaseIntelligence index 30.8
- 2026-08-24Anthropic made Claude Sonnet 5's introductory API pricing permanent at $2/M input, $10/M output tokens.Milestone
- 2026-08-14Claude in Chrome began sharing saved Cowork sessions, skills, and connectors with desktop, web, and mobile.Milestone
- 2026-08-05Claude Cowork became available on web and mobile for all paid plans.Milestone
- 2026-07-24Anthropic released Claude Opus 5 for complex agentic coding and enterprise work.Model Release
Milestones written by Frontier Index from Artificial Analysis release dates, disclosed funding rounds, the official newsroom and major tech press. Linked rows open the original report.
Newsroom
source ↗- 2026-10-28AnnouncementsModel Launch
- 2026-10-18Investing in the public benefitRelease
- 2026-10-26Anthropic files S-1 with the SEC for proposed initial public offeringModel Launch
- 2026-09-21FeaturesRelease
- 2026-10-28AI for Science expands to foundations and research institutionsResearch
- 2026-10-27Expanding our partnership with GSA to bring Claude to all levels of governmentRelease
- 2026-10-27PartnershipsRelease
- 2026-10-22Donating Agent Skills to the Agentic AI FoundationRelease
Partners & Investors
- Total raised
- $133.15B
- Latest round
- $65B (Series H)
- Funding rounds
- 9
Funding rounds
- Series H$65B
May 2026 · Altimeter Capital, Dragoneer, Greenoaks, Sequoia Capital
- Series G$30B
Feb 2026 · GIC, Coatue, D. E. Shaw, Dragoneer, Founders Fund, ICONIQ, MGX
- Series F$13B
Sep 2025 · ICONIQ, Fidelity, Lightspeed
- Series E$3.5B
Mar 2025 · Lightspeed, Bessemer, Cisco, Fidelity, General Catalyst, Menlo Ventures, Salesforce Ventures
- Series D$750M
2024 · Menlo Ventures
- Series C$750M
May 2023 · Spark Capital, Google, Salesforce Ventures
- Series B$580M
2022 · FTX / Alameda Research
- Series A$124M
2021 · Jaan Tallinn, Dustin Moskovitz
Disclosed figures only · as of Aug 2026