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Anthropic releases Opus 5.5 with lower prices and Fable-level performance

BACKGROUND
1 SIGNALFIRST DETECTED 22 September 2026
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How the story developed
Other feeds and industry voices
30 Jun
Anthropic rolls out Sonnet 5 with near-Opus 4.8 performance at a lower price

Anthropic is now rolling out Sonnet 5, and it's almost as good as the Opus range, but it is designed to be cheaper than the company's flagship model. [...]

REPORT · WHAT · BleepingComputerOPEN STORY
28 Sept
Anthropic releases Sonnet 5.5, which it calls a significantly cheaper, faster work partner

Anthropic has released the newest version of its mid-range model, boasting faster response times and less token burn.

REPORT · WHAT · TechCrunch AIOPEN STORY
24 Jul
Anthropic releases Opus 5 with ‘close’ to Fable 5’s capabilities

Anthropic releases Opus 5 with ‘close’ to Fable 5’s capabilities

OPINION · WHAT · The VergeOPEN STORY
24 Jul
Anthropic releases Opus 5 with ‘close’ to Fable 5’s capabilities

Weeks after Anthropic's latest toe-to-toe with the US government, and days after an OpenAI security incident that dominated tech industry discussions, Anthropic on Thursday

REPORT · WHO · The Verge TechOPEN STORY
16 Apr
Anthropic releases a new Opus model amid Mythos Preview buzz

Anthropic has released its most powerful "generally available" model to date: Claude Opus 4.7. The company called it a step up from Opus 4.6 for advanced software engineering

REPORT · WHAT · The Verge TechOPEN STORY
1 Sept
Anthropic launches Claude Fable 5.1 and says it’s up to 45 percent cheaper for agentic work

Anthropic says its newest AI models, Fable 5.1 and Mythos 5.1, address criticisms from customers about price, data retention, and overzealous safeguards. The company claims Claude

REPORT · WHO · The Verge TechOPEN STORY
1 Sept
Anthropic’s new Fable release is cheaper, less restrictive

Fable 5.1 includes changes meant to reduce token cost and false-positive restrictions from the model's safeguards.

REPORT · WHAT · TechCrunch AIOPEN STORY
24 Jul
Anthropic rolls out Opus 5 AI model in efficiency upgrade reut.rs/4fzmNhQ

Anthropic rolls out Opus 5 AI model in efficiency upgrade reut.rs/4fzmNhQ

OPINION · WHAT · ReutersOPEN STORY
Sources
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