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Claude Sonnet 5.5

Anthropic · Claude Sonnet series · released 28 Sep 2026

Sentiment · since 25 Sep
55
positive
from 628 opinions
Mentions
657
posts and comments

What people praise and criticise

Sentiment per day

Mentions per day

Reddit vs benchmarks

$2 in / $10 out per million tokens · 1M context · reasoning mode

Per subreddit

r/codex
65
r/ChatGPT
59
r/ClaudeCode
59
r/ClaudeAI
56
r/claude
56
r/OpenAI
55
r/Anthropic
53
r/singularity
48
r/SillyTavernAI
46

Threads behind the opinions

ThreadOpinionsIndex
Claude Sonnet 5.5 Released4048
Introducing Claude Sonnet 5.5, the second model in the Claude 5.5 family3541
Introducing Claude Sonnet 5.5, the second model in the Claude 5.5 family2551
Introducing Claude Sonnet 5.5, the second model in the Claude 5.5 family2048
Sonnet 5.5 beats Opus 5.5 at coding and it's half the price??1754
Claude Sonnet 5.5 is here1747
Sonnet 5.5 (high) oneshot a Full Mario Kart from 1 prompt1678
Sonnet 5.5 has been out for an hour. Has anyone gotten a chance to stress test it?1666
Claude Sonnet 5.5 is one day old and already one-shot this entire 3D zombie FPS in 49 minutes for $177. The gap between describing a game and having a playable game is collapsing.1553
So what do we think about Sonnet 5.5 so far guys?1457
Sonnet 5.5 is great and all but where to use it?1358
Sonnet 5.5 on Vals AI benchmark, if these hold true the $20 is insane value right now1354
Sonnet 5.5 is not worth using it unless at Low/Med effort1235
Sonnet 5.5 did this. Opus 5.5 quality with half price.1143
Is it me or sonnet 5.5 doesn’t make sense at all?1032
Sonnet 5.5 on Vals AI benchmark, if these hold true the $20 is insane value right now1060
Sonnet 5.5 is by far the best free model available right now1065
Sonnet 5.5 vs Opus 5.5: the Terminal-Bench "win" is Max vs Xhigh. Here's the fair comparison.8–
Sonnet 5.5 > 6-Sol (30% Cheaper & faster sonnet-5)8–
Dev Day? More like Death Day8–