The day in AI
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Everything from this day
Launches and products
29 Sep 2025AnthropicClaude Sonnet 4.5 Claude Sonnet 4.5 reaches 77.2% on SWE-bench Verified and 61.4% on OSWorld, and Anthropic reports it staying on task for 30+ hours.29 Sep 2025DeepSeekDeepSeek-V3.2-Exp (DeepSeek Sparse Attention) First production use of DeepSeek Sparse Attention, with V3.1-Terminus-level quality, lower long-context cost and API prices cut by over 50%.29 Sep 2025AnthropicClaude Agent SDK Anthropic releases the Claude Agent SDK, the harness behind Claude Code, so developers can build their own long-running agents.29 Sep 2025AnthropicClaude Code 2.0, checkpoints and VS Code extension Claude Code 2.0 adds checkpoints that rewind code and conversation, a native VS Code extension, subagents, hooks and background tasks, with Sonnet 4.5 as default.29 Sep 2025OpenAIInstant Checkout and the Agentic Commerce Protocol ChatGPT adds Instant Checkout, buying from Etsy sellers in chat, built on the open Agentic Commerce Protocol co-developed with Stripe.
Research
29 Sep 2025DeepSeekDeepSeek Sparse Attention (V3.2-Exp) DeepSeek Sparse Attention (DSA) in V3.2-Exp is fine-grained sparse attention with output quality near V3.1-Terminus, which enabled a 50%+ API price cut.29 Sep 2025AnthropicEffective context engineering for AI agents Anthropic frames 'context engineering', curating the finite tokens an agent sees, as the successor to prompt engineering for long-running agents.