Anthropic Releases Claude Opus 5: Frontier Reasoning and 1M Long-Horizon Agent Intelligence
Anthropic has unveiled Claude Opus 5, its flagship frontier model delivering unprecedented coding capabilities, 1M context comprehension, and state-of-the-art agentic reasoning.
| Platform | Route Identifier | Context | Max Output | Rate / Tier | Status |
|---|---|---|---|---|---|
| Anthropic Messages API | claude-opus-5 | 1M tokens (1,000,000) | 128K tokens (128,000) | $5.00 / $25.00 per 1M tokens ($0.50 cached prompt) | active |
| OpenRouter | anthropic/claude-opus-5 | 1M tokens (1,000,000) | 128K tokens (128,000) | $5.00 / $25.00 per 1M tokens ($0.50 cached prompt) | active |
| OpenRouter (Fast Route) | anthropic/claude-opus-5-fast | 1M tokens (1,000,000) | 128K tokens (128,000) | High-throughput accelerated route | active |
Key Takeaways
- check_circleClaude Opus 5 delivers Anthropic's highest benchmark score ever on SWE-bench Verified (88.4%), resolving complex real-world GitHub issues autonomously.
- check_circleSupports a 1,000,000-token context window with prompt caching down to $0.50/1M tokens, enabling cost-effective multi-turn agent execution.
- check_circleNative Computer Use 2.0 capabilities allow reliable browser and operating system navigation with pixel-perfect visual precision.
- check_circleConfigurable reasoning effort levels provide granular control over cognitive depth versus latency.
- check_circleAIMI registered the live route on OpenRouter on 24 July 2026 at 19:02:24 SAST.
Cognitive Leap in Long-Horizon Software Engineering
Claude Opus 5 represents Anthropic's most significant intellectual achievement since the release of Claude 3.5 Sonnet. Designed from the ground up for deep cognitive tasks, Opus 5 exhibits self-correcting logic, recursive decomposition, and robust multi-step planning.
In extensive testing across developer environments, Opus 5 routinely executes entire software refactorings spanning dozens of interconnected files without suffering architectural drift. Its enhanced attention mechanism ensures that architectural constraints specified at token index 0 remain active at token index 950,000.
Economical Prompt Caching for Production Systems
Despite its frontier status, Anthropic priced Opus 5 aggressively at $5.00 per million prompt tokens and $25.00 per million output tokens. For production pipelines that maintain long static contexts (such as design systems, corporate knowledge bases, or repository indexes), Anthropic's prompt caching slashes input costs by 90% to $0.50/M tokens.
Safety and Steerability Architecture
Opus 5 incorporates Anthropic's Constitutional AI 3.0 framework, dramatically reducing sycophancy while maintaining complete alignment with enterprise policy. Developers can steer tone, precision, and tool invocation style with unprecedented accuracy.
Frequently Asked Questions
How does Claude Opus 5 compare to Sonnet 5?
While Sonnet 5 is optimized for daily high-speed engineering and interactive chatbots, Opus 5 is built for complex, mission-critical autonomous agents, deep research, and high-difficulty mathematical reasoning.
What is the pricing for Claude Opus 5?
Standard API pricing is $5.00 per 1M input tokens and $25.00 per 1M completion tokens, with cached input prompts priced at $0.50 per 1M tokens.
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