Obsidian 3
An Anthropic internal codename model, described as a next-generation entry in the Opus series. Its benchmark scores are reported to be slightly higher than those of Opus 5.5. It is an unconfirmed rumored model designation.
Timeline (last 90 days)
Developers found that a model codenamed Obsidian 3 scored slightly higher than Opus 5.5 on a benchmark platform and it was identified as the next-generation Opus, but the news has not been officially confirmed.
Obsidian 3, a model suspected to be Fable 5.5, scored 46.8% on the Frontier Code 2.0 benchmark at high reasoning intensity, only narrowly leading Opus 5.5's 45.5%.
Obsidian 3's single inference cost is about $47, 3.6 times that of Opus 5.5 at the same intensity.
All Facts (3)
Developers found that a model codenamed Obsidian 3 scored slightly higher than Opus 5.5 on a benchmark platform and it was identified as the next-generation Opus, but the news has not been officially confirmed.
50%UnverifiedObsidian 3, a model suspected to be Fable 5.5, scored 46.8% on the Frontier Code 2.0 benchmark at high reasoning intensity, only narrowly leading Opus 5.5's 45.5%.
50%UnverifiedObsidian 3's single inference cost is about $47, 3.6 times that of Opus 5.5 at the same intensity.
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