Unverified60% confidenceBenchmarkExact time
Claude Opus 5 approaches Fable-level performance on the FrontierCode 1.1 benchmark while costing only half as much
2
Sources
60%
Confidence
Medium-term (~90 days)
Relevance
7/23/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedOn Frontier Code, Opus 5.5's medium tier (under $1 per task) actually scored higher than its max tier (over $5 per task).72% similarUnverifiedOn Frontier Code, the performance gap among GPT-6 Sol, Luna, and Opus 5.5 is only about 6–7 percentage points, but their prices range from 10 cents, to $2, to $4.70% similarUnverifiedObsidian 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%.68% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/680219API
curl https://kongchang.com/api/v1/knowledge/claims/680219MCP
get_claim(id=680219)