Anthropic's Claude model leading the VIALS-AA scientific visual reasoning benchmark at 67%, notable for high-frequency batched t
Anthropic is pursuing two major moves at once: launching an IPO roadshow to raise up to $64.35 billion at a $1T-$1.4T valuation with Google and Nvidia participating, and releasing Claude Fable 5.2 and Claude Mythos 5.2, which it claims surpass GPT-6 Astra in coding with 30% faster output and 20% lower cost. Google also opened its strongest reasoning model Gemini 4 Carbon the same day, intensifying frontier model competition.
Anthropic launched Claude Fable 5.2 and Claude Mythos 5.2, built around one model with two safeguard levels: Fable 5.2 runs classifiers that block high-risk cyber and research-biology requests and routes them to Opus models, while Mythos 5.2 drops those blocks and is limited to vetted organizations. On FrontierCode 2.0, Fable 5.2 scores 49.1% at Xhigh effort versus 45.5% for Opus 5.5 and 42.8% for GPT-6 Astra, and at High effort it matches Opus 5.5's best score at roughly half the cost per task, though Gemini 4 Carbon still leads AutomationBench and all figures are self-reported. Pricing is $8/$40 per million tokens with a 1M-token context window and 128K output, plus a fast mode up to 2.5x faster.
Anthropic released Claude Fable 5.2 and a new Mythos version on the same day its IPO roadshow began, reclaiming the world's top model spot from Gemini 4 Carbon after just 10 days. Per-token pricing fell 20% to $8 input and $40 output per million tokens, but higher token consumption pushed SemiAnalysis's GDPx professional-task cost from $67.16 to $88.15 per task.
Anthropic released Claude Fable 5.2 and Claude Mythos 5.2, claiming notable gains across coding, reasoning, scientific research, cybersecurity and robotics, with up to 30% faster output and 20% lower cost. Fable 5.2 scored 49.1% on the agentic coding benchmark FrontierCode 2.0, beating GPT-6 Astra at 42.8% and Gemini 4 Carbon at 41.1%, and also led on multidisciplinary reasoning tests. Anthropic demonstrated it coordinating over 1,000 agents over eight days to build a bootable operating system from scratch.
Anthropic documentation reveals that simply telling Claude Fable 5.2 the codebase is its own raised its rate of merging duplicated code from under 10% to roughly 50% in small coding-task tests. The finding shows that ownership framing strongly steers whether the model conservatively extends existing structure or actively refactors it.
Artificial Analysis built VIALS-AA on Handshake AI's VIALS benchmark to test visual reasoning over life-science artifacts such as gel blots, plasmid maps and phylogenies. Claude Fable 5.2 leads at 67%, ahead of Gemini 4 Carbon (64%) and GPT-6 Astra (63%). The more notable signal is tool-use strategy: Fable averages roughly 37 tool calls per task with heavy batching, versus about 8 for Astra, suggesting reasoning models are shifting toward multi-step tool orchestration rather than single-shot answers.
Artificial Analysis reports that Claude Fable 5.2 (Max) now ranks first on AA-3D, its benchmark for interactive 3D generation, scoring 1271 Elo, 67 points ahead of Claude Sonnet 5.5 and Opus 5.5, with a confidence interval that overlaps no other model. It gains 132 points over its predecessor Fable 5.1 and beats the top OpenAI and Google entries, GPT-6 Astra (1168) and Gemini 4 Argon (1147).
Anthropic released Claude Fable 5.2 (xHigh), which took first place on Arena's Code Arena WebDev leaderboard with 1832 points, ahead of Claude Opus 5.5, Gemini 4 Carbon and GPT-6 Astra. The update is up to 30% faster than Fable 5.1 and cheaper at $8/$40 per million tokens. Arena also showcased 17 generations spanning 3D worlds, playable games, website UI, data visualizations and interactive code-generated animations.
Anthropic released Claude Fable 5.2 and Claude Mythos 5.2, with Fable 5.2 taking first place on the Code Arena WebDev leaderboard at 1832 points, ahead of Claude Opus 5.5, Gemini 4 Carbon and GPT-6 Astra. Anthropic claims up to 30% faster performance than Fable 5.1 and lower pricing of $8/$40 per million tokens.
Anthropic launched Claude Fable 5.2 and Mythos 5.2 on a shared base model, with Fable for general users and Mythos restricted to vetted cybersecurity and life-science institutions. API pricing drops 20% versus the prior generation and generation speed rises up to 30%, while pre-release tests included 1,000+ sub-agents building a bootable OS prototype from scratch in eight days.