Anthropic launches Claude Sonnet 5.5: 30%+ faster, up to 30% cheaper per task
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This daily AI brief from Sept 29 covers multiple major announcements. Anthropic released Claude Sonnet 5.5 across its Platform and Claude Code, the second model in the 5.5 family, with Haiku 5.5 still weeks away. It maintains the same list price as Sonnet 5 at $2/$10 per 1M tokens, with cache reads at $0.20, and is officially described as 30%+ faster and up to 30% cheaper per task. It is the first Sonnet with Opus-class cyber safeguards. OpenAI's DevDay keynote is today, promising 20+ launches including Codex plugins, a 1,000-hour internal agent run, and multiplayer Codex. The $200 Pro subscription reopens to new subscribers tomorrow. The WSJ reports that GPT-6.1 Astra will not ship, with an October target pulled over safety and alignment. xAI launched Team Bots in public beta for Teams and Enterprise, offering shared teammates with skills, plugins, and credentials in Slack or Grok Bot. NVIDIA released the Open Agent Safety Platform with 100+ partners. ElevenLabs shipped v4 and v4 Turbo with median latency ~100 ms and 90+ languages. Kling released 4.0 Flash for Ultra Yearly subscribers, with full 4.0 coming in October. Manus 2.0 adds persistent cloud workspaces and Cue, an agent with email, phone, wallet, and a Cloud Computer.
Source report
Anthropic 🔥
- Claude Sonnet 5.5 is now live everywhere, including the Platform and Claude Code. It is the second model in the 5.5 family; Haiku 5.5 remains weeks away.
- Pricing matches Sonnet 5: $2 per 1M input tokens and $10 per 1M output tokens, with cache reads at $0.20. Official claims: 30%+ faster and up to 30% cheaper per task.
- First Sonnet to include Opus-class cyber safeguards. Cursor already has the slug.
OpenAI 🔥
- DevDay keynote is today. The teaser promised 20+ launches; the agenda points to Codex plugins, a 1,000-hour internal agent run, and multiplayer Codex.
- Pro $200 plan reopens to new subscribers tomorrow. Usage math nets to about half the old plan’s API dollars. No 5-hour cap is returning. Extra subscription features tomorrow will not draw usage.
- WSJ: GPT-6.1 Astra will not ship. The October target has been pulled over safety and alignment concerns.
- Build strings name "Dots": text, call, Slack, email, buy with approval, plus a custom-shaped character. "Spaces" also appeared separately.
xAI 🔥
- Team Bots are in public beta for Teams and Enterprise. Shared teammates with skills, plugins, and credentials in Slack or Grok Bot.
NVIDIA 🔥
- Open Agent Safety Platform is out with 100+ partners. Includes OpenShell plus Sentry; BlueField-4 and DOCA sit outside the agent’s reach.
ElevenLabs 🔥
- v4 and v4 Turbo have shipped. Turbo median latency is ~100 ms. Supports 90+ languages.
- Two-week API promo: $22 per 1M characters (standard) / $11 per 1M characters (turbo). Instant clones from 10 seconds of audio.
Kling 🔥
- 4.0 Flash is live for Ultra Yearly subscribers. Full 4.0 arrives in October: 4K HDR, 15 references, 10 keyframes, native 30-second clips.
Manus 🔥
- 2.0 adds persistent cloud workspaces and Cue, an agent with email, phone, wallet, and a Cloud Computer.
Used Grok to compose this brief, cherry-picking the news and doing some post-editing. This daily brief also arrives in the daily email format; subscribe on the blog.
Source
testingcatalogNeutral / independent
Part of this Story
Anthropic releases Claude Sonnet 5.5, confirms Haiku 5.5 and Opus 5.5 launch plans