Anthropic Tests Fable 5.5 Model
A brief catalog listing for Anthropic's Fable 5.5 appeared and was removed, as OpenAI's GPT-6.2 Astra also draws attention.
Updated on Nov. 2, 2026 in Artificial Intelligence
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A catalog entry for Anthropic's Fable 5.5 model surfaced on October 13, 2026 and was removed by October 14, 2026. A reference to a "2-astra" model also appeared in Codex usage data for some accounts on November 1, 2026, with reports linking it to OpenAI's GPT-6.2 Astra.
Why it matters
The apparent test activity points to a rapid cadence of frontier model releases between Anthropic and OpenAI following the June and September 2026 launches. No independent benchmarks exist yet for either model, so their capabilities remain unverified.
The most recent verified pricing is GPT-6 Astra at $10 input and $50 output per million tokens, released September 3, 2026. Neither Fable 5.5 nor GPT-6.2 Astra has published specifications or benchmark results.
The players
Anthropic
Anthropic is an artificial intelligence company that develops the Claude family of AI models and is preparing a Nasdaq listing.
OpenAI
OpenAI is an artificial intelligence research company known for the GPT series of large language models and the ChatGPT product.
The details
A catalog entry for Fable 5.5 surfaced on October 13, 2026 and was removed the following day. A reference to "2-astra" appeared in Codex usage data for some accounts on November 1, 2026, which has been linked to the GPT-6.2 Astra model.
Timeline
June 9, 2026: Anthropic launched Fable 5.
September 3, 2026: OpenAI released GPT-6 Astra.
October 13, 2026: A Fable 5.5 catalog entry surfaced.
November 1, 2026: A 2-astra reference appeared in Codex usage data.
The Tech Race
The reported test activity follows Anthropic's June 9, 2026 launch of Fable 5 and OpenAI's September 3, 2026 release of GPT-6 Astra, extending a pattern of frequent frontier model updates between the two companies. Anthropic's pending Nasdaq listing, with $17.0 billion in third-quarter revenue and $96 billion in cash, places the company in a capital-intensive race against OpenAI.
For users of these AI tools, the pricing and capability of the next models will determine the cost of API access and the performance of everyday applications. Until benchmarks are published, the practical gains from Fable 5.5 or GPT-6.2 Astra remain unknown.
The takeaway
Watch for independent benchmarks before judging whether Fable 5.5 or GPT-6.2 Astra advances on GPT-6 Astra's $10/$50 per million token pricing and capability. Early catalog and usage-data signals are not confirmation of a release.
What happens next
Anthropic's roadshow for its Nasdaq listing cannot begin before November 10, 2026, following the amended S-1 filings of October 26 and November 2, 2026.
Further reading
For broader context on the model race, explore Artificial Intelligence coverage on Wisevoter.
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