Anthropic released Claude Opus 5 on July 24, calling it a step-change improvement over Opus 4.8. The model approaches Fable 5 intelligence at roughly half the price, with a 1M token context window and…
Anthropic deleted more than 80% of Claude Code's system prompt for the Claude 5 generation — Opus 5 and Fable 5 — with no loss on coding evals, according to a new post by Thariq Shihipar on context en…
A developer independently replicated Anthropic's claim that its Fable 5 model can play Pokémon FireRed using only raw screenshots, achieving the first gym badge in 1,785 turns at a cost of $65.40. How…
Cursor launched Cursor Router, an intelligent model router for Teams and Enterprise customers that selects an AI model before each coding request, targeting frontier-level performance while reducing s…
Anthropic released Claude Opus 5, which ranks first on the Artificial Analysis Intelligence Leaderboard and achieves near-Fable 5 capabilities at lower cost by removing over 80 percent of system promp…
Amazon is routing most Alexa+ queries away from Anthropic's expensive frontier models to cheaper alternatives, and Stanford's 2026 AI Index confirms a broader industry shift toward intelligence per do…
Claude reported elevated errors for Mythos 5, Fable 5, Opus 5 and Claude Haiku 4.5, with users able to subscribe to email or SMS updates for incident notifications.…
Anthropic's newest AI model, Claude Opus 5, is now available to the public, matching or exceeding its predecessor Fable 5's performance in most areas while costing roughly half as much per token, acco…
Anthropic reduced the system prompt powering its Claude Code coding agent by approximately 80%, from roughly 800 tokens to 164, with no performance loss and potential improvement, announced engineer T…
Anthropic announced Claude Opus 5, a new model positioned just below its flagship Fable 5 while costing about half as much to use. Pricing remains unchanged at $5 per million input tokens and $25 per …
Anthropic's new flagship model Claude Opus 5 achieves top scores in coding and knowledge work at half the token price of Fable 5, scoring 30.2 percent on the ARC-AGI-3 benchmark, nearly four times hig…
Anthropic launched Claude Opus 5, achieving an ECI of 159 and matching Fable 5 on SWE-ECI at 161, according to Epoch AI Research. Independent evaluations show Opus 5 outperforming Fable in coding and …
Anthropic's Claude Opus 5 API introduces three new behaviors: an effort toggle with five levels controlling reasoning depth and cost, a Fast Mode delivering 2.5x speed at six times the standard price,…
Anthropic launched Claude Opus 5 on July 24, 2026, at $5 per million input tokens and $25 per million output tokens, half the cost of its own Fable 5 model, while matching output quality and using one…
Anthropic launched Opus 5, a new AI model delivering near-Fable 5 performance at half the cost, targeting everyday office work and coding tasks. The model, released July 25, 2026, features lighter saf…
Anthropic released Claude Opus 5 on July 24, scoring 30.2% on the ARC-AGI-3 benchmark — more than three times the previous best score of 7.8% by GPT-5.6 Sol — and beating Fable 5 on agentic terminal c…
Anthropic released Claude Opus 5 on July 24, offering near-Fable-5 performance at the same pricing as Opus 4.8 ($5 per million input tokens, $25 per million output tokens), deliberately cannibalizing …
Anthropic removed over 80% of the Claude Code system prompt for its newest models Opus 5 and Fable 5, sharing lessons learned about writing system prompts, skills, and Claude.MDs for them. A user repo…
Anthropic's Claude Opus 5 is closing the gap with Mythos-class model Fable 5 on complex coding tasks, according to developer benchmarks. In tests on asynchronous race conditions in TypeScript, Opus 5 …
Anthropic PBC launched Claude Opus 5, a large language model that approaches the output quality of its top-end Mythos 5 algorithm in many areas but costs significantly less, and is now the default mod…