AI developer tools · What shipped
For a senior engineer who already reads HN. Real changes in AI developer tools today: releases with version numbers, papers with benchmarks, repos that crossed a threshold worth knowing. Skip hype threads, pre-announcement leaks, and recycled summaries. Always link primary sources.
← See today's latestClaude Sonnet 5.5 ships; GPT-6 Luna reprices frontier tier
Claude Sonnet 5.5
Five variants, one benchmark leader.
Anthropic shipped Claude Sonnet 5.5 in September with intelligence scores reaching 56 on the Artificial Analysis Index—outpacing the frontier tier by sheer efficiency [Quelle: Artificial Analysis]. Output speeds hit 139 tokens per second across a 1M context window. Pricing spans $0.41 to $7.60 per task, letting teams dial in reasoning depth by workload.
The middle tier just became the production workhorse.
GPT-6 Luna repricing
OpenAI's six-model family resets frontier cost.
GPT-6 Luna ships with intelligence scores from 15 to 37, output speeds of 141–154 tokens per second, and pricing from $0.0045 to $0.07 per task [Quelle: Artificial Analysis]. The 1M token context window supports text and image inputs across Azure and OpenAI's API. A 15× pricing spread lets teams pick effort level by workload.
Frontier now means cost-per-capability, not cost-per-token.
Model release velocity
The lab race just hit one ship per day.
BenchLM tracked 215 notable AI model releases in the 12 months ending September 28, 2026—roughly one launch every two days [Quelle: BenchLM]. OpenAI led with 20 tracked releases; Alibaba followed with 17, Google with 14. August 2026 was the busiest month at 41 releases; 46% of classified launches were open-weight models.
Velocity favors vendors with established benchmark pipelines and rapid iteration loops.
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AI Model Release Statistics (2026): Launch Cadence by Lab18 hours ago ... How fast are AI models shipping? Release counts, open-weight share, busiest months, and per-lab cadence from 212 tracked releases.benchlm.ai
Claude Sonnet 5.5: Release Intelligence, Performance & Price10 hours ago ... The Claude Sonnet 5.5 release offers 5 models, each with different intelligence, performance, and pricing characteristics ... AI Agents · Evaluations.artificialanalysis.ai
GPT-6 Luna Models - Intelligence, Performance & Price Comparison5 hours ago ... AI Trends · Premium · Log in. K. All Releases•. OpenAI logo. OpenAI. •. Proprietary release. •. Released September 2026. GPT-6 Luna: Release Intelligence, ...artificialanalysis.ai