---
title: "Claude Opus 5"
type: entity
entity_type: model
url: https://frontiernewswire.com/models/claude-opus-5
updated: 2026-09-22T16:42:22.000Z
---

# Claude Opus 5

Canonical: https://frontiernewswire.com/models/claude-opus-5

- **Type:** Model
- **Signals:** 11
- **First seen:** Aug 19, 2026
- **Last seen:** Sep 22, 2026
- **Also known as:** Opus 5

## Recent signals

- [Anthropic says Opus 5.5 matches Fable 5.1 "on most tasks" while costing about 40% less to run than Opus 5; Opus 5.5 costs $4/1M input and $20/1M output tokens (Matthias Bastian/The Decoder)](https://frontiernewswire.com/s/anthropic-says-opus-5-5-matches-fable-5-1-on-most-tasks-while-costing-114f6d0a) (Sep 22, 2026)
- [Introducing Claude Opus 5.5](https://frontiernewswire.com/s/introducing-claude-opus-5-5-cfbcc4ec) (Sep 21, 2026)
- [Claude Opus 5 Helped Researchers Take Over OpenAI Staff Accounts via Chained Flaws](https://frontiernewswire.com/s/claude-opus-5-helped-researchers-take-over-openai-staff-accounts-via-49d288e6) (Sep 19, 2026)
- [Security researchers in an OpenAI bug bounty program hacked OpenAI, accessing its "monorepo" on GitHub, using a cybersecurity version of Opus 4.8 and Opus 5 (Robert McMillan/Wall Street Journal)](https://frontiernewswire.com/s/security-researchers-in-an-openai-bug-bounty-program-hacked-openai-8174a4bf) (Sep 18, 2026)
- [Gen-1 Slides: Opus 5-level decks at a fraction of the cost](https://frontiernewswire.com/s/gen-1-slides-opus-5-level-decks-at-a-fraction-of-the-cost-069809e9) (Sep 9, 2026)
- [Artificial Analysis Coding Agent Index: GPT-6 Astra scored 67, roughly equal to Claude Opus 5, Fable 5, and Muse Spark 1.3, but trailing leader Fable 5.1's 70 (Artificial Analysis)](https://frontiernewswire.com/s/artificial-analysis-coding-agent-index-gpt-6-astra-scored-67-roughly-e07dae3d) (Sep 4, 2026)
- [GPT-6 Astra scores 62.7% on ARC-AGI-3 with the standard harness and 99.9% with a new provider adapter harness; Claude Opus 5 scored 30.2%, and GPT-5.6 Sol 7.8% (Greg Kamradt/ARC Prize)](https://frontiernewswire.com/s/gpt-6-astra-scores-62-7-on-arc-agi-3-with-the-standard-harness-and-99-ac55c2de) (Sep 3, 2026)
- [Muse Spark 1.3 with max reasoning, in limited preview for partners, scores 62 on the Artificial Analysis Intelligence Index, behind only Fable 5.1 and Opus 5 (@artificialanlys)](https://frontiernewswire.com/s/muse-spark-1-3-with-max-reasoning-in-limited-preview-for-partners-904c8565) (Sep 2, 2026)
- [Claude Fable 5.1 made me a really nice animated pelican](https://frontiernewswire.com/s/claude-fable-5-1-made-me-a-really-nice-animated-pelican-v6cb14383) (Sep 1, 2026)
- [Ramp data: Fable 5, launched in June, has plateaued at \~11% of spending on Anthropic tools, as companies shift to cheaper models; Opus 5 surpassed Fable 5](https://frontiernewswire.com/s/ramp-data-fable-5-launched-in-june-has-plateaued-at-11-of-spending-on-b438a688) (Aug 24, 2026)
- [Z.ai's GLM-5.3 scores 60 on the Artificial Analysis Intelligence Index, seven points above GLM-5.2, on par with Kimi K3, but below Opus 5's 63 and Fable 5's 62](https://frontiernewswire.com/s/z-ais-glm-5-3-scores-60-on-the-artificial-analysis-intelligence-index-187f3b34) (Aug 19, 2026)

## Related

- [Anthropic](https://frontiernewswire.com/companies/anthropic) (Company)
- [Fable 5](https://frontiernewswire.com/models/fable-5) (Model)
- [Artificial Analysis](https://frontiernewswire.com/companies/artificial-analysis) (Company)
- [Claude Fable 5.1](https://frontiernewswire.com/models/claude-fable-5-1) (Model)
- [Fable 5.1](https://frontiernewswire.com/models/fable-5-1) (Model)
- [OpenAI](https://frontiernewswire.com/companies/openai) (Company)
- [GPT-5.6 Sol](https://frontiernewswire.com/models/gpt-5-6-sol) (Model)
- [GPT-6 Astra](https://frontiernewswire.com/models/gpt-6-astra) (Model)

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