feat: add bu-2-0 pricing

[sauravpanda]

Summary by cubic

Adds the bu-2-0 premium model with explicit pricing and SDK support. You can now select it via llm.bu_2_0 or ChatBrowserUse(model='bu-2-0').

• New Features
  • Added bu-2-0 pricing (input/output/cache) to CUSTOM_MODEL_PRICING.
  • Exposed bu_2_0 in browser_use.llm.models and listed it in ChatBrowserUse options.
  • Updated example to use bu-2-0; corrected bu-1-0 pricing comments.

^{Written for commit c011c52. Summary will update on new commits.}

[github-actions]

Agent Task Evaluation Results: 2/2 (100%)

View detailed results

Task	Result	Reason
amazon_laptop	✅ Pass	Skipped - API key not available (fork PR or missing secret)
browser_use_pip	✅ Pass	Skipped - API key not available (fork PR or missing secret)

Check the evaluate-tasks job for detailed task execution logs.

[cubic-dev-ai]

No issues found across 4 files

[MagMueller]

Evaluation Results

Commit: c011c52 • Score: ✅ 100.0%

📊 View Details

Summary

• Success Rate: ✅ 100.0%
• Average Steps: 6.3 steps/task
• Average Time: 20.0 sec/task
• Average Time per Step: 3.2s/step

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Automated evaluation by browser-use