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Claude Sonnet 5.5 expected next week, same pricing as Sonnet 5
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According to a post on X by user pankajkumar_dev, Anthropic's Claude Sonnet 5.5 is expected to launch next week, most likely on Tuesday or Thursday, possibly Tuesday to coincide with OpenAI DevDay. The model is currently in grey testing within Claude Code, with some accounts already routed to it. Partners have also received access to a newer checkpoint and have provided positive feedback to Anthropic. The poster claims Sonnet 5.5 outperforms GPT-6 Sol in most areas and represents a significant improvement over Sonnet 5, describing it as insanely fast, efficient, and more natural in writing style, with a reduction in Claude's typical AI-ish tone. Pricing is expected to remain unchanged from Sonnet 5.
Source report
Claude Sonnet 5.5 is anticipated to launch next week, according to recent reports.
Key Details
- Testing status: Sonnet 5.5 is currently in grey testing within Claude Code, with some accounts already routed to the new version.
- Partner feedback: Partners have received access to a newer checkpoint and appear satisfied with the quality, having sent feedback to Anthropic.
- Release window: Likely Tuesday or Thursday next week, with Tuesday being the more probable date due to OpenAI DevDay.
Performance and Improvements
- Outperforms GPT-6 Sol in most areas and represents a significant step up from Sonnet 5.
- Significantly faster, more efficient, and delivers much more natural output.
- Claude's slightly AI-ish writing style has been notably improved in this version.
Pricing
- Same pricing as Sonnet 5 — no changes.
Source
pankajkumar_devNeutral / independent
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