Anthropic's per-model prompting pages serve as a maintenance list for instruction files like CLAUDE.md, which become stale after each model release because new models interpret prompts more literally,…
Anthropic's Claude Opus 5 matches or beats its larger Fable 5 model on most benchmarks at half the price, with a record jump to 30.2% on ARC-AGI-3, nearly quadrupling the previous frontier record. Pri…
Anthropic released Claude Opus 5, priced the same as Opus 4.8 with a fast mode at twice the cost, featuring improved general capabilities that led to substantial gains in finding cybersecurity vulnera…
Anthropic released Claude Opus 5 with relaxed cybersecurity safeguards, allowing vulnerability finding in source code while blocking exploit generation, a shift from the restrictive policies of Fable …
Stripe is in talks to acquire AI model marketplace OpenRouter for $10 billion, signaling that model choice and routing are becoming essential infrastructure for AI development. Anthropic released Clau…
Anthropic released Claude Opus 5, a model that costs $5 per million input tokens and $25 per million output tokens—half the price of its higher-tier Fable 5—while using one-seventh the reasoning token…
Anthropic released Claude Opus 5, replacing Opus 4.8 as the Opus-tier flagship with unchanged pricing at $5 per million input tokens and $25 per million output tokens. The model scored 43.3% on Fronti…
Anthropic released Claude Opus 5 on Friday, halving its cost compared to Fable while offering near Fable 5 intelligence, but the new model adds to user confusion over which Claude model to use. Opus 5…
Anthropic on Thursday released Claude Opus 5, a model that matches or exceeds its flagship Fable 5 on most coding and knowledge-work benchmarks at half the token price, costing $5 per million input to…
Anthropic shipped Claude Opus 5 today. An engineer created an unofficial 55-second launch video using the brand's exact design tokens, including colors, typefaces, and SVG paths, with transitions chos…
Anthropic launched Claude Opus 5, a model it says approaches the frontier intelligence of Claude Fable 5 at half the price, designed for everyday use with improved efficiency and safety. The company i…
Anthropic has removed over 80% of Claude Code's system prompt for its newest generation models, including Claude Opus 5 and Claude Fable 5, with no measurable loss on coding evaluations. The company a…
Claude Opus 5 (Adaptive Reasoning, Max Effort) leads the Artificial Analysis Intelligence Index with a score of 61, out of 170 models evaluated, according to Artificial Analysis. The top five models a…
Anthropic launched Claude Opus 5 on July 24, 2026, claiming it approaches the intelligence of its Fable 5 model at half the cost. The company says Opus 5 doubles the performance of its predecessor on …
Anthropic released Claude Opus 5 on Friday, calling it its safest and most aligned model to date, with the lowest rates of deceptiveness and susceptibility to misuse among prior models. The model is p…
Anthropic released Claude Opus 5 at the same price as Opus 4.8 ($5 in, $25 out), half the cost of Fable 5, while achieving within 0.5% of Fable 5 on CursorBench 3.2 and tripling the next-best model on…
Anthropic launched Claude Opus 5, an AI model that costs half the price of its Fable 5 model while delivering similar performance, according to company benchmarks. Opus 5 outperforms Fable 5 in busine…
Anthropic released Claude Opus 5 on July 24, pricing it at $5 per million input tokens—half the cost of Claude Fable 5—while outperforming Fable 5 on most major benchmarks, including a 43.3% score on …
Anthropic's Claude Opus 5 has topped the Artificial Analysis Intelligence Index with a score of 61, edging past Claude Fable 5's 60 and pushing GPT-5.6 Sol into third place at 59. Anthropic is offerin…
Anthropic and AWS announced the availability of Claude Opus 5 on Amazon Bedrock and Claude Platform on AWS, marking Anthropic's most advanced Opus model and the first in the fifth generation. The mode…