Model launchesAnthropic's Mythos model shown to select US leaders; Portfolio Checklist discusses AI risks and agricultural damage from spring weatherThe latest Portfolio Checklist podcast covers Anthropic’s new AI model, Mythos, which the company has revealed only to a very small group of US stakeholders including Pentagon officials and senior bank executives due to its unexpectedly powerful capabilities.2 min read
Model launchesxAI’s Grok 4.3 Improves but Still Trails Leading ModelsxAI released Grok 4.3 with lower API prices, faster response, better tool integration and higher benchmark scores than prior Grok versions.2 min read
Model launchesOpenAI: strongest model launch in a week — GPT-5.5 accelerated revenue growthOpenAI announced that GPT-5.5 represents its strongest model launch to date one week after release; API revenue is growing more than twice as fast as with previous releases, and Codex revenue doubled in less than seven days.1 min read
Model launchesAlibaba’s HappyHorse Scores Moderately After Gray TestingAlibaba’s HappyHorse video model entered gray testing on April 27 after leading Artificial Analysis’s blind video arena over Seedance.2 min read
Model launchesMoonshot AI releases Kimi K2.6 — a 1T-parameter open vision-language model for long-running autonomous codingMoonshot AI has released Kimi K2.6, a 1 trillion-parameter vision-language model that supports very long autonomous code generation loops and larger multi-agent orchestration.5 min read
Model launchesOpenAI’s GPT-5.5 Boosts Benchmark Scores but Shows High Rate of Confident ErrorsOpenAI’s GPT-5.5 advances to state‑of‑the‑art results on several objective benchmarks—especially in knowledge, agentic tasks and abstract visual reasoning—while simultaneously producing a high proportion of incorrect but confident answers.4 min read