Anthropic Releases Claude Opus 5.5: Fable 5.1-Level Performance at 40% Lower Running Cost Than Opus 5
Anthropic released Claude Opus 5.5, matching Fable 5.1 on most work at about 40% lower cost.
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Organization
Frontier Design
- Mentions · 7d0
- Mentions · 30d0
- All mentions5
- First seenSep 22, 2026
- Last mentionedSep 22, 2026
Timeline
5 articles · newest firstClaude Opus 5.5 matches Fable 5.1 performance at lower cost and promises less "Claudish" writing
Anthropic launched Claude Opus 5.5, matching Fable 5.1 at about 40 percent lower cost.
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Anthropic releases Opus 5.5 with lower prices and Fable-level performance
Anthropic released cheaper, faster Claude Opus 5.5 and called it its strongest model.
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Anthropic launches Claude Opus 5.5 with stricter safeguards for cybersecurity
Anthropic launched Claude Opus 5.5 with cybersecurity and biology safeguards that reroute risky requests to weaker models.
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Claude Opus 5.5
Anthropic released Claude Opus 5.5, matching Fable 5.1 on most work at about 40% lower cost with stronger safeguards.
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Appears with
- METRorganization · 5
- Claude Opus 5ai model · 5
- Anthropicorganization · 5
- Claude Opus 5.5ai model · 5
- Claude Sonnet 5.5ai model · 4
- Claude Opus 4.8ai model · 4
- Claude Fable 5.1ai model · 4
- Claude Haiku 5.5ai model · 4
- Anthropicvendor · 3
- OpenAIorganization · 3
- GPT-6 Astraai model · 3
- GPT-5.6 Solai model · 3
- Claudeproduct · 2
- Zapierorganization · 2
- Claude Mythos 5.1ai model · 2
- Amazon Web Servicesorganization · 1
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