Unverified50% confidenceFactExact time
Leaked specifications show that Sonnet 5.5 has a 1 million token context window, a maximum output of 128,000 tokens, adaptive thinking enabled by default, and removal of forced tool calls.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
9/28/2026
First Seen
Valid until: 12/27/2026
Sources
Related Entities
Related Claims
UnverifiedA similar Sonnet 5 leak (codenamed Phoenix) appeared in February of this year, but the model that was ultimately officially released was Sonnet 4.6, not Sonnet 5.70% similarUnverifiedIn a macOS interface cloning task, Sonnet 5 generated a complete desktop environment, but took approximately 40 minutes and consumed a large number of tokens in the workbench.68% similarUnverifiedBedrock Agent Core uses the Sonnet 4.5 model by default in demonstrations.64% similarUnverifiedClaude Sonnet 4 is positioned above the previous Opus series, with the company officially describing it as a new category within the Sonnet series.63% similarUnverifiedSonnet 5 performs well at generating macOS-style interface code, but the generation takes approximately 40 minutes and consumes a large number of tokens, making it extremely inefficient.61% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/954836API
curl https://kongchang.com/api/v1/knowledge/claims/954836MCP
get_claim(id=954836)