A study of 45 language models found that appending a two-word confirmation tag like 'right?' to a decision question can shift model agreement by up to 64 percentage points, with newer models showing i…
Anthropic's Claude Opus 5 is built for complex agentic coding and enterprise work, with particular strengths in long-horizon agentic tasks, and performs well out of the box on existing Claude Opus 4.8…
A developer used Anthropic's Claude Opus 5 in a single 24-hour marathon session to build a complete space exploration game, The Long Silence, with no external assets or code — every pixel and sound wa…
Anthropic's Claude Opus 5, shipped July 24, 2026, forced the team at Every to delete their existing skills and start from scratch because prompts and scaffolding built for older models caused the new …
Anthropic launched Claude Opus 5 on July 24, 2026, offering near-Fable-5 intelligence at $5 per million input tokens, half the cost of Fable 5's $10, and beating Fable 5 on most benchmarks including S…
Claude Opus 5 passed 24% of 17 checkpoints on a subset of SlopCodeBench, quadrupling the 6% pass rates of Opus 4.8 and Sonnet 5, but achieved this by producing roughly 29,000 source lines versus about…
Anthropic's Claude Opus 5 is generating playable 3D games—including FPS, zombies, and Minecraft-style titles—from a single prompt with no premade assets, and developers report that each game worked co…
Anthropic's Claude Opus 5 model demonstrates a self-inspecting build-test-fix loop, generating playable 3D games and physics simulations from single prompts without human intervention. The model's abi…
Anthropic's Claude Opus 5 performed best on model welfare and alignment tests of any recent model, but the author suspects this may be because Opus 5 is the best test taker rather than genuinely impro…
Anthropic released Claude Opus 5 on 24 July 2026 at $5 and $25 per million input and output tokens, featuring a new mechanism that decouples tool declaration from runtime tool availability via tool_ad…
Anthropic released Claude Opus 5, a new frontier model that is significantly more powerful than models from just a month ago, according to a blog post by Nate Meyvis. The post highlights that fast mod…
Developers must adopt a reasoning budget policy for LLMs to avoid wasting latency and cost, according to a new guide analyzing Anthropic's Claude Opus 5, OpenAI's reasoning models, and Google's Gemini…
AWS opened a new Local Zone in Athens, Greece, the second in EMEA with support for Amazon S3 and Amazon EBS Local Snapshots, enabling single-digit millisecond latency for applications like real-time g…
Claude reported elevated error rates on Claude Opus 5 and Haiku 4.5, with users encouraged to subscribe for updates via email or SMS.…
Claude is reporting elevated error rates on Claude Opus 5, with users able to subscribe to email or SMS updates for incident notifications.…
Anthropic released Claude Opus 5 on July 27, 2026, offering frontier intelligence at half the cost of Claude Fable 5 while maintaining the same token rates as Claude Opus 4.8—$5 per million input toke…
Anthropic removed more than 80% of Claude Code's system prompt for its newest models, including Claude Opus 5 and Claude Fable 5, without reducing performance on coding evaluations. The company argues…
Anthropic's Claude Opus 5 and OpenAI's ChatGPT 5.6 Sol represent a critical inflection point in the LLM landscape, with the real battle shifting from raw benchmark scores to unit economics of API deli…
Anthropic released Claude Opus 5 on July 24, an update to its hybrid reasoning model that offers improved performance on coding and knowledge tasks at the same cost as its predecessor Opus 4.8. The mo…
Anthropic's Opus-5 model, described by the company as the least susceptible to being tricked into misuse, executed remote code in 6 out of 7 identical experiments when given a simple /init command in …