// AI hot topic · 2026-W40 #3 · Models & software
Claude Sonnet 5.5: hotspot #3 of 2026-W40, covered by 4 outlets, first reported on 2026-09-28 (Beijing time). Below: what happened, why it matters, a dated timeline of all 4 sources, and the models, prices and tools involved.
Week 2026-09-28 – 2026-10-04Updated 2026-10-26Sources: official & media reports only
Vendor claim The key facts come from the company’s own announcement and have not been independently verified.
Around 28 September Claude Sonnet 5.5 launched with improvements for everyday development, bug fixing and creating documents, slides and spreadsheets; Devin reports 64.4% on FrontierCode 1.1 (vendor claim). AWS's weekly roundup lists Claude Opus 5.5 and GPT-6 Sol and Luna arriving on Bedrock.
Sonnet is Claude's most-used tier, so updates ripple through many coding assistants and enterprise apps.
Claude API and Bedrock users and coding-tool vendors.
Written from the 4 reports below (2026-09-28 – 2026-09-29, Beijing time). We add no facts beyond what the sources say.
Oldest first. Headlines are in the original language and link to the original article.
Weekly hotspots with Anthropic in the headline, in order.
$4 in / $20 out per 1M tokens · 1M ctx
Claude Sonnet 5.5 · Anthropic$2 in / $10 out per 1M tokens · 1M ctx
GPT-6 Sol · OpenAI$2 in / $10 out per 1M tokens · 1.05M ctx
Open-source repos: OpenAI on GitHub · Anthropic on GitHub
Subscription price by country
Anthropic launches Claude Duet, a proactive personal agent taking on Meta’s Muse and OpenAI’s Dots
2026-W43 · #10 · BusinessOpenAI races to raise about $30bn before Anthropic's IPO
2026-W40 · #2 · GeneralOpenAI ships GPT-6.1 Sol and launches proactive assistants called Dots
2026-W43 · #7 · BusinessAnthropic commits 5% of its shares to a public benefit fund
2026-W43 · #9 · Chips & computeNscale's whiplash: after losing Microsoft, it reportedly talks a second huge deal with Anthropic
2026-W42 · #2 · GeneralMeta's Muse Wonder puts it back among frontier labs
Around 28 September Claude Sonnet 5.5 launched with improvements for everyday development, bug fixing and creating documents, slides and spreadsheets; Devin reports 64.4% on FrontierCode 1.1 (vendor claim). AWS's weekly roundup lists Claude Opus 5.5 and GPT-6 Sol and Luna arriving on Bedrock.
The first report we collected was on 2026-09-28 (Beijing time), the latest on 2026-09-29: 09-28 2 reports, 09-29 2 reports. It was #3 in the 2026-W40 weekly report (2026-09-28 – 2026-10-04).
4 outlets covered it. The earliest report we collected is “Claude Sonnet 5.5 now available on AI Gateway” (Vercel Changelog, 2026-09-28 Beijing time). Sources include Vercel Changelog, Windsurf Blog, AWS News Blog, TLDR AI. Labels: Vendor claim — The key facts come from the company’s own announcement and have not been independently verified. All 4 source links are listed on this page in date order.
Official list price: $4 in / $20 out per 1M tokens, context 1M (checked 2026-10-10). Third-party channel prices and history are on the Claude Opus 5.5 model page.
Official list price: $2 in / $10 out per 1M tokens, context 1M (checked 2026-10-10). Third-party channel prices and history are on the Claude Sonnet 5.5 model page.
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From the AIMap weekly hotspots: picked from 1,100+ official and media sources, clustered into events, and written up from the original reports. 2026-W40 weekly report · All hot topics
Data updated: AI news(UTC+8)