Anthropic: claude-opus-4-7:free

Claude Opus 4.7 is Anthropic's most advanced flagship model, specifically engineered for complex agentic reasoning, autonomous software engineering, and high-fidelity multimodal understanding. It introduces a groundbreaking "Self-Verification" mechanism, allowing the model to proactively audit its own logical plans and catch errors before execution. With its upgraded vision system supporting up to 3.75MP resolution, it can perceive technical diagrams and UI screenshots with 1:1 pixel precision. In 2026, Opus 4.7 is widely regarded as the industry gold standard for long-horizon projects that require sustained focus, literal instruction-following, and deep cognitive effort across massive 1M-token codebases.