claude-opus

OpenCode v1.15.13 introduces custom session metadata storage through its API and SDK. The release fixes a bug where Anthropic's Opus 4.7+ adaptive reasoning returned empty thinking blocks instead of summarized thinking.

Anthropic closed a $65 billion Series H at a $965 billion valuation, making it the most valuable AI startup globally and surpassing OpenAI's $852 billion March valuation. The company simultaneously released Claude Opus 4.8 and announced plans to bring its Mythos cyber-focused model to all customers within weeks.

Anthropic released Claude Opus 4.8 on Thursday, its fastest upgrade cycle at 41 days since the previous Opus 4.7. The model includes a new Dynamic Workflows feature designed to manage complex tasks across hundreds of parallel subagents, with pricing unchanged from previous Opus releases.

Anthropic's Claude Opus 4.7 release triggered a sharp increase in false positive refusals, with developers filing 30+ complaints in April 2026 compared to 2-3 monthly reports from July-September 2025. The company deployed aggressive Acceptable Use Policy guardrails to prepare for the eventual release of its Mythos vulnerability research model.

Anthropic released Claude Design for Mac, a new research preview powered by Claude Opus 4.7. The tool automatically builds design systems by analyzing codebases and design files, then applies team colors, typography, and components to future projects.

Anthropic's Claude Opus 4.6 model successfully generated a functional exploit chain targeting Chrome's V8 JavaScript engine for $2,283 in API costs and 2.3 billion tokens. Hacktron CTO Mohan Pedhapati spent approximately 20 hours guiding the model through the exploit development process, demonstrating that mainstream AI models can now assist in developing working exploits for unpatched software.

Anthropic has released Claude Opus 4.7, the latest version of its flagship Opus family designed for long-running, asynchronous agent tasks. The model features a 1 million token context window and costs $5 per million input tokens and $25 per million output tokens.