Clay’s report

Maker
Anthropic
Released
Sep 28, 2026
Scanned for Clay
Oct 5, 2026

Claude Sonnet 5.5

Claude Sonnet 5.5 is a model from Anthropic, released Sep 28, 2026. What it could let Clay do, as a hypothesis: could cut what each research run costs, so the agent reads more accounts per credit and finishes a list the same day. At least one benchmark was measured by a third party.

Claude Sonnet 5.5: a model from Anthropic

Anthropic’s new Sonnet 5.5 model. VentureBeat reports 30% lower cost per task, from faster responses and fewer tool calls per job.

Kind
Model drop
Verification
Independent benchmarks
Availability
not stated
First seen in
google-news

What Claude Sonnet 5.5 could do for Clay

Hypothesis

Could cut what each research run costs, so the agent reads more accounts per credit and finishes a list the same day.

The job it serves for Clay
A data-science job that used to take days, the buyer now wants done in hours.
Verification of Claude Sonnet 5.5’s numbers
Independent benchmarks

Claude Sonnet 5.5: five numbers, all independent

  • Artificial Analysis Intelligence Index

    56

    Compared to
    median: 26
    Source
    Artificial Analysis
    Verification
    Independent

  • Output tokens per second

    127 tokens per second

    Compared to
    Not stated
    Source
    Artificial Analysis
    Verification
    Independent

  • Cost per Intelligence Index task

    $7.67

    Compared to
    Not stated
    Source
    Artificial Analysis
    Verification
    Independent

  • LMArena Top 10 Agents, Best Overall

    12.52 %

    Compared to
    Anthropic Claude Fable 5.1 (Max) 14.31 %
    Source
    LMArena
    Verification
    Independent

  • Context window

    1M

    Compared to
    Not stated
    Source
    Artificial Analysis
    Verification
    Independent

Claude Sonnet 5.5’s evidence: two citations.

Evidence: 2 sources