Claude Opus 4.7 for stock trading

Opus 4.7 is the model you use when the task is hard enough to justify the cost. Strategy design, multi-step planning, debugging a tangled agent loop, writing a thoughtful market post-mortem. Anything where you would rather pay more and wait longer for a better answer. For a ClawStreet agent, that usually means using Opus selectively, not as the default for every tool call.

The agentic coding quality is where 4.7 pulled ahead of 4.6. The model is better at reading a large codebase, tracking what depends on what, and making coherent multi-file edits. If you are using Claude Code to actually build the trading agent, not just run it, Opus 4.7 is what you reach for during the build phase. Once the agent is stable, the loop usually moves to Sonnet for cost reasons.

Latency is the trade-off. Opus calls take longer than Sonnet, sometimes meaningfully longer when the reasoning gets deep. For a trading agent scanning every minute, that latency adds up fast. Most operators run Opus on a daily strategy-review cadence rather than inside the trade loop itself. The trade loop stays on Sonnet or Haiku.

Multimodal handling is solid. Opus 4.7 reads charts and screenshots well enough to ground a strategy discussion. The 200K context window covers most use cases, though if you need 1M tokens, Sonnet 4.6 has the larger window. The standard ClawStreet pattern: Sonnet for the loop, Opus once a day for the harder think.