Claude Opus 5

Nvidia researchers report that a custom agent harness with a supervisory component drove Claude Opus 5 from a 30% baseline score to a perfect 100% on the ARC-AGI-3 benchmark. The findings add to mounting evidence that scaffolding, not the underlying model, is the dominant factor in long-horizon agentic performance.

Z.ai's GLM-5.3 ties Kimi K3 for the top spot among open models on the Artificial Analysis Intelligence Index, driven by a major leap in agentic task performance. The company is delaying the open-weight release by about two weeks, citing the model's unusually strong vulnerability-detection capabilities.

xAI's Grok 4.6 ties OpenAI's GPT-5.6 Sol on the Artificial Analysis Intelligence Index with a score of 61, trailing only Anthropic's Claude Opus 5 and Claude Fable 5. Pricing remains at $2/$6 per million tokens, undercutting both competitors by more than 60 percent.

Anthropic's Claude Opus 5 can generate playable 3D games, including first-person shooters and Minecraft clones, from a single text prompt with zero external assets. Community tests claim it outperforms GPT-5.6 Sol and Kimi K3 in physics realism and mechanical complexity, though no standardized benchmark has confirmed the comparisons.

OpenAI says GPT-5.6 Sol scores 38.3 percent on ARC-AGI-3 using a custom Responses API configuration, edging out Claude Opus 5's 30.2 percent. Under the official benchmark harness, GPT-5.6 Sol's score drops to 7.8 percent, raising questions about what the comparison actually measures.

Claude Opus 5 scored 30.2 percent on the ARC-AGI-3 benchmark, nearly four times the previous record of 7.8 percent set by OpenAI's GPT-5.6 Sol (Max). The ARC Prize team attributes the leap to genuinely stronger reasoning, though an independent test on a separate puzzle benchmark showed far smaller improvements.

Anthropic's system card for Claude Opus 5 reports a 0% prompt injection success rate across 129 browser agent test scenarios when Auto Mode is enabled. On Gray Swan's broader indirect prompt injection benchmark, Opus 5 posted a 2.0% attacker success rate after 15 attempts, the lowest among tested frontier models.

Anthropic's Claude Opus 5 posts a 61 on the Artificial Analysis Intelligence Index, narrowly beating Claude Fable 5 (60) and GPT-5.6 Sol (59) while costing less per task. The model leads in coding and knowledge-work benchmarks but shows a rising hallucination rate of 50 percent.

Anthropic released Claude Opus 5 on July 24, 2026, positioning it as a lower-cost alternative to its more expensive Claude Fable 5 model. Independent evaluators Epoch AI and Artificial Analysis report mixed but largely favorable results, with Opus 5 nearly matching Fable 5 on coding benchmarks while cutting cost-per-task by roughly 20%.

Anthropic released Claude Opus 5 on July 24, its fourth model launch in under two months, priced at $5 per million input tokens and $25 per million output tokens. The company claims the model matches or beats its flagship Fable 5 on most coding and knowledge-work benchmarks while posting the lowest deception rate of any model it has shipped.

Anthropic has released Claude Opus 5, its new flagship model, claiming performance comparable to rival model Fable 5 at half the cost. The company says Opus 5 leads on several coding and knowledge-work benchmarks while requiring far less manual intervention.

Anthropic's Claude Opus 5 is now available on Amazon Bedrock and Claude Platform on AWS, marking the first release in the company's fifth-generation Opus line. Anthropic claims the model matches its top-tier Claude Fable 5 intelligence at Opus-tier pricing, though specific pricing and benchmark figures remain undisclosed.

Anthropic has released Claude Opus 5, upgrading from Opus 4.8, with pricing held at $5 per million input tokens and $25 per million output tokens. The company claims the model approaches the intelligence of its flagship Fable 5 model at half the cost.

Anthropic has released Claude Opus 5, its new flagship model built for complex reasoning, coding, and multi-agent coordination. The model ships with a 1 million token context window and pricing of $5 per million input tokens and $25 per million output tokens.

Anthropic has released Claude Opus 5 (Fast), a higher-throughput variant of Opus 5 that carries identical capabilities but runs at roughly 2x the price of the standard model. The model ships with a 1 million token context window and is available now through OpenRouter.

Anthropic released Claude Opus 5 on July 24, 2026, pricing it identically to Opus 4.8 at $5 per million input tokens and $25 per million output tokens while claiming performance approaching its higher-tier Fable 5 model. The release includes a faster processing mode, automatic safety fallbacks, and mid-conversation tool switching that preserves prompt caching.

The anthropic-sdk-python v0.120.0 release adds a reference to a model identifier called claude-opus-5, the first public sign of a next-generation Opus model. Anthropic has not issued an official announcement, and no pricing, context window, or benchmark data has been disclosed.