Anthropic ships Claude Sonnet 5.5: 30%+ faster and up to 30% cheaper than Sonnet 5
mikeyk · x · 2026-09-29
- Anthropic has officially launched Claude Sonnet 5.5, the second model in the Claude 5.5 family.
- The company claims it's a clear upgrade over Sonnet 5, running 30%+ faster and costing up to 30% less for most workloads.
Related event: Anthropic Launches Claude Sonnet 5.5: 30% Faster, Up to 30% Cheaper(35 posts)→
More from Models
- Every team tests Sonnet 5.5: half Opus's token price, matches it on writing readability — kieranklaassen · 2026-09-29
- Anthropic says Sonnet 5.5 at low/medium effort beats Sonnet 5's best scores at ~1/10 the cost — airesearch12 · 2026-09-29
- Power user burns 170M+ tokens a week on ChatGPT, credits GPT 5.5 for winning him over — ChrisUniverse · 2026-09-29
- Every's vibe check: Claude Sonnet 5.5 runs 30%+ faster, up to 30% cheaper than Sonnet 5 — danshipper · 2026-09-29
- User: Claude Opus 5.5 beats Fable 5.1 on speed and quota, new Fable likely near — haider1 · 2026-09-29
- Sonnet 5.5 Ships With Opus-Level Writing Gains, But Mid-Tier Models May Be Dying — every · 2026-09-29