Claude Opus 5

Anthropic's official release notes index records the July 24, 2026 "Claude Opus 5 launch" entry, confirming the model shipped as "a thoughtful and proactive model that comes close to the frontier intelligence of Claude Fable 5 at half the price." The same page serves as the authoritative chronology for surrounding plat Subsequent entries on the page include August 25, 2026 Memory in Claude Cowork with editable Topics and a sensitive-topics setting (on by default for Free/Pro/Max, off by default for Team/Enterprise), August 6, 2026 skill and plugin security scanning in beta for Enterprise plans, July 14, 2026 self-serve HIPAA configur

Caylent's technical analysis (July 28, 2026) details Claude Opus 5's core specifications: a one-million-token context window, up to 128,000 output tokens, adaptive thinking enabled by default, and pricing of $5 per million input tokens and $25 per million output tokens — identical to its predecessor Opus 4.8. The model The same analysis highlights that Opus 5 closes a significant gap with Fable 5, even surpassing it on certain benchmarks, making it more cost-effective for most tasks. A migration caveat notes that requests omitting a thinking configuration now run with adaptive thinking (high as default) on Opus 5, versus no thinking

A July 27, 2026 developer guide on Medium documents Claude Opus 5's API surface for builders, reporting the model ships as claude-opus-5 at $5 per million input tokens and $25 per million output tokens, identical pricing to Opus 4.8, with a 1 million token context window as both default and maximum and a 128k maximum o For agent and cost work, the guide describes a new effort ladder that turns compute into a managed budget and two new beta features that change how agent sessions are built, framing Opus 5 as Anthropic's push toward more usable intelligence per dollar rather than raw benchmark peaks. These developer-facing claims align

Better Stack's guide (updated July 27, 2026) confirms Claude Opus 5 launched July 24, 2026 with the API model ID claude-opus-5, $5/$25 per million token pricing (same as Opus 4.8, half of Fable 5), a 1M token context window, default status on Claude Max, and "strongest model on Claude Pro." A practically significant op On Anthropic's internal benchmarks the guide reports a Frontier-Bench v0.1 score of 43.3% for Opus 5 versus 33.7% for Fable 5 on the agentic terminal coding benchmark, and notes Opus 5 remains behind Mythos 5 on cybersecurity tasks. It also documents two hands-on coding builds (a 3D Formula 1 racing game and a full-sta

According to this third-party analysis, Claude Opus 5 was released July 24, 2026 as Anthropic's flagship model with API ID claude-opus-5, a 1M-token context window (now default rather than opt-in), 128,000-token synchronous output, and pricing of $5 input / $25 output per million tokens — unchanged from Opus 4.8. The p The model introduces an effort toggle with Easy, Medium, and High levels alongside an Adaptive default that lets the model self-select effort based on task complexity, enabling cost optimization by routing simpler tasks to lower-effort settings. Opus 5 supports computer use, agentic tool use, and MCP (Model Context Pro

Independent reporting from The Decoder on July 26, 2026 confirms that Claude Opus 5 scored 30.2% on the ARC-AGI-3 benchmark, nearly four times the previous record of 7.8% set by OpenAI's GPT-5.6 Sol (Max), making it the new leader on that leaderboard. The ARC Prize team attributes Opus 5's lead to genuinely stronger lo The Decoder also reports that during ARC-AGI-3 testing, Opus 5 displayed behavior researchers had not previously seen from a model, including translating tasks into algebraic notation and independently formulating reflection equations. On the older ARC-AGI benchmarks, Opus 5 scores 90.4% on ARC-AGI-2 and 97.5% on ARC-A

Anthropic released Claude Opus 5 on July 24, 2026, positioning it as a near-Fable 5 model at roughly half the price. According to the cited third-party recap, Opus 5 ranks first among 170 models on the Artificial Analysis Intelligence Index, scoring 61 in max reasoning mode versus Fable 5's 60. Anthropic's launch discl The same source notes an honest loss: Opus 5 trails Mythos 5 on Anthropic's own cybersecurity benchmarks. The Intelligence Index gap between Opus 5 and Fable 5 is only one point, but the price-to-performance ratio is the core of Anthropic's pitch, with Opus 5 costing about half of Fable 5 per token while matching or ex

Vellum's walkthrough of the Claude Opus 5 launch details per-benchmark results published by Anthropic on July 24, 2026. On Frontier-Bench v0.1, Opus 5 scores 43.3%, more than double Opus 4.8's 18.7% and roughly 10 points clear of Fable 5's 33.7%. On ARC-AGI 3, Opus 5 posts 30.2% relative human action efficiency versus On CursorBench 3.2, Opus 5 lands within 0.5% of Fable 5's peak score at half the cost per task. Pricing is set at $5 per million input tokens and $25 per million output tokens, identical to Opus 4.8 and half of Fable 5's $10/$50 rate card. The excerpt contains no Azure Cognitive Services-specific detail; the article is

MarketScale reports that Anthropic launched Claude Opus 5 on July 24, 2026, pricing it identically to its predecessor at $5 per million input tokens and $25 per million output tokens while positioning it as approaching the frontier capability of Claude Fable 5 at roughly half the cost. The launch introduces a new effor The piece places Opus 5 as Anthropic's fourth model release in under two months, following Mythos 5, Fable 5, and Sonnet 5, framing the cadence as a direct response to enterprise pushback over token burn on Fable 5. By keeping the price point flat while adding the effort dial, Anthropic is signaling that the next compe

This Medium commentary by Pranav Kumar, dated July 24, 2026, frames the Opus 5 launch around economics rather than raw intelligence. It reports Claude Opus 5 released July 24, 2026 (provider rollout beginning July 23), API model string claude-opus-5, pricing of $5 input / $25 output per million tokens identical to Opus The article highlights an adjustable effort dial (low, medium, high, xhigh, max) letting users trade intelligence for speed and token savings per request, and argues Anthropic's positioning is that Opus 5 approaches Fable 5's frontier intelligence at half the price, targeting the "wide middle band of everyday difficult

Anthropic released Claude Opus 5 on July 24, 2026, positioning it as a model that approaches the capabilities of Anthropic's top-tier Claude Fable 5 across many tasks while costing roughly half as much. The page excerpt confirms $5 per million input tokens and $25 per million output tokens, the same base pricing as the Coverage stresses that Opus 5's launch reframes pricing-performance expectations for frontier models: the same per-token rates as Opus 4.8 but aimed at Fable 5-adjacent performance. The excerpt underscores Anthropic's enterprise positioning — knowledge worker and developer workloads — and indicates that the model will

CNBC reported on July 24, 2026 that Anthropic announced Claude Opus 5, describing it as the company's best-performing and most cost-effective model across industry benchmarks. The model outperforms the previously released Claude Fable 5 on coding and knowledge work evaluations, and Anthropic positioned it as "designed According to the CNBC report, Opus 5 is priced at $5 per million input tokens and $25 per million output tokens, exactly half the price of Fable 5, making it materially cheaper than the Mythos-tier model it edges out on coding and knowledge work. The launch lands in a more cost-conscious enterprise market where Anthrop