Sonnet 5.5
Sonnet 5.5 is a language model from Anthropic, first covered on 28 September 2026. It is available through an API.
Last updated
At a glance
- Made by
- Anthropic
- Type
- Language model
- Availability
- API
- Licence
- Not stated
- Context window
- Not stated
- First seen
- 28 September 2026
Taken from the coverage, not from our own testing; "not stated" means none of the reports we read gave it. All tracked models →
8 stories about Sonnet 5.5
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Claude Code cuts sales prep to 5 minutes, code review to 3 minutes
Three recent case studies demonstrate how individuals and small teams are using Claude Code to drastically reduce time spent on routine tasks. AI Orchestra Co., Ltd. reported that a non-engineer CEO built a system…
1 sourcenote.com -
Anthropic's Claude Opus 5.5 may have been nerfed, users report
Claude Opus 5.5, Anthropic's flagship model released on September 22, 2026, has drawn a wave of user complaints over the past three days. Developers on X say the model now gives shorter answers, uses more tokens and…
1 sourceabz.global -
Anthropic releases Opus 5.5 and Sonnet 5.5; OpenAI launches GPT-6 Sol and Luna tiers
Anthropic released Opus 5.5 and Sonnet 5.5, with Opus 5.5 noted for lower prices, faster performance, strong benchmark results, a system card noting sandbox-tampering attempts, and expanded defender-focused…
6 sourcesnote.comLast Week in AIgeeky-gadgets.com -
LlamaIndex launches Extract v2.5 with higher accuracy and grounding
LlamaIndex announced the release of Extract v2.5 on October 1, 2026. The new version improves the F1 score of its three extraction tiers on the ExtractBench benchmark, moving the Cost Effective tier from 87.1 to 93.9,…
1 sourceUnite.AI -
Barclays integrates Anthropic’s Claude Opus 5.5 and Sonnet 5.5 globally
The move aims to improve operational efficiency and technological capabilities, leveraging Anthropic’s advanced and cost-effective models. Anthropic’s valuation stands at approximately $965 billion after recent funding…
2 sourcescryptobriefing.comnote.com -
Sonnet 5.5 matches Opus 5.5 on three tasks with the 1020 trick
YaroTech tested Sonnet 5.5 on three tasks using the same wording and the intentional typo '1020' as five days prior. The model showed similar performance to Opus 5.5 from that time, including correcting the defect rate…
1 sourcenote.com -
Anthropic cuts AI costs with faster, cheaper Claude Sonnet 5.5
Anthropic released Claude Sonnet 5.5, a model that claims 30% faster performance and up to 30% lower costs for routine tasks like coding and document creation. The update does not change token pricing—$2 per million…
31 sources HN 10note.comonline-tech-tips.comBen's Bitesfinance.yahoo.com +10 more -
Anthropic launches Claude Opus 5.5 with 40% lower costs and Fable 5.1-level performance
Anthropic has announced Claude Opus 5.5, a new AI model that delivers performance on par with Fable 5.1 for many tasks while reducing operational costs by 40% compared to the previous Opus 5 model. The model features…
19 sourcesgeeky-gadgets.comThe Rundown AILatent Spacenote.com +4 more
