Claude Sonnet 4.6
Model at Anthropic
The basics
As of Nov 1- Status
- Price
- Context
- Open weights
Updates
Role
Mid-size model at Anthropic
Sep 2026 to now · 2 months
Jun 2026 to Sep 2026 · 3 months
Feb 2026 to Jun 2026 · 4 months
Works with
From recorded changes
Agent · 1 shared change
Similar models
$2 in, $10 out
$2 in, $10 out
$3 in, $15 out
Cost vs peers
Tied for most expensive of 4 similar models by output price.
Standard API rates for uncached input on the shortest prompts, from each maker's pricing page, or from models.dev for models not researched here yet.
Where it works
Prices and uptime are OpenRouter's figures for each provider's cheapest endpoint. Uptime covers the last 24 hours.
Benchmarks
Higher is better. Green is Claude Sonnet 4.6. Dark marks are similar models.
Independent
What people say
Reviews (1)
Lior GrossmanShipping software since 1993, now building with AISonnet 4.6 beat Opus in my blind reads, twice. I compared its book chapters with Opus 4.7 and then Opus 4.8 without knowing which model wrote which. An AI judge preferred Opus both times. I picked Sonnet 11 to 8, then 12 to 3. My taste was consistent: short sentences, plain modern words, concrete scenes, named people and worked-out numbers. Sonnet 4.6 wrote that way more often. It speaks to the reader as "you" and starts easy before it gets to equations. I moved to Sonnet 5 and 5.5 later that year.
Oct 31, 2026
Writing habits
Creative writing · EQ-Bench, among 51 models tracked here
Slop score
9.9
Overused AI words and phrases. Less slop than 84% of tracked models.
Repetition
4.1
Repeated words and ideas. Less repetition than 34% of tracked models.
Story length
5,876
Average characters per story. Longer than 20% of tracked models.