AI Weekly Malaysia

Anthropic released Claude Sonnet 5.5, which per Anthropic "runs 30%+ faster, and costs up to 30% less for most work" while priced the same as Sonnet 5, and in Simon Willison's hands-on tests it beat Sonnet 5 on every benchmark and came close to Opus 5.5 on some coding tasks. Sonnet 5.5 is now the model behind the free tier on claude.ai, which Willison notes makes Anthropic's free offering more capable than ChatGPT's free tier running Luna 5.6. He also reproduced an Opus 5.5 failure mode: at "max" thinking effort the model burned 128,000 tokens (~$1.28) and failed to produce an SVG, while "xhigh" effort produced output in 41 seconds for 5.74 cents; Haiku 5.5 is still promised "in the coming weeks".

Why: If you pay for Sonnet-tier API calls, the same price now buys a model that is roughly 30% faster and cheaper to run, and Willison reports it nearly matching Opus 5.5 on coding tasks — a concrete reason to re-run your evals before defaulting to a pricier model. If you prototype on free tiers, claude.ai's free tier now serves Sonnet 5.5 rather than a weaker small model, so the WebGL-pelican-style prompt he tested is a free way to gauge output quality before spending. Set a thinking-token ceiling: his "max" run spent $1.28 and 128,000 tokens and still returned nothing.

Google published an announcement page titled "Gemini 4 Argon: our next era of frontier intelligence," but the text captured here is only site chrome — navigation menus, product categories, a list of Google regional blogs, and a language picker. No benchmarks, pricing, context window, model variants, or availability details appear anywhere in the source text. The Hacker News thread for it drew 1441 points and 944 comments, so builder attention is clearly high even though nothing substantive can be extracted from the page as provided.

Why: You cannot make a model-selection or migration decision from this item — there is no spec sheet, no price, no latency or context figure, and no date beyond the 2026-09-30 publish timestamp. If Gemini 4 Argon matters to your stack, treat this page as a signpost only and go read the actual announcement and the HN comment thread before changing anything; anything you decide from this summary alone would be guesswork.