INFO [service] Using anonymized telemetry, see https://docs.browser-use.com/development/monitoring/telemetry. INFO [Agent] 🔗 Found URL in task: https://www.gov.uk/vat-rates, adding as initial action... INFO [Agent] 🎯 Task: Go to https://www.gov.uk/vat-rates and report the UK standard VAT rate and the reduced rate, exactly as stated on the page. Then finish. INFO [Agent] Starting a browser-use agent with version 0.13.11, with provider=openai and model=grok-4.20-0309-non-reasoning INFO [BrowserSession] Setting viewport to 1920x1200 with device scale factor 1.0 whereas original device scale factor was 1.0 INFO [Agent] ▶️ navigate: url: https://www.gov.uk/vat-rates, new_tab: False INFO [tools] 🔗 Navigated to https://www.gov.uk/vat-rates INFO [Agent] INFO [Agent] 📍 Step 1: INFO [Agent] 👍 Eval: Page was pre-loaded with the target URL and all required VAT rate information is visible in browser_state. Verdict: Success INFO [Agent] 🧠 Memory: Page https://www.gov.uk/vat-rates is loaded. Standard VAT rate stated as 20%, reduced rate as 5%. All info directly observed in current browser_state. Task complete, ready to report and finish. INFO [Agent] 🎯 Next goal: Call done action to report the exact rates from the page and complete the request. INFO [Agent] ▶️ done: text: UK standard VAT rate: 20% UK reduced rate: 5% These are stated exactly as on the page at https://www.gov.uk/vat-rates (standard rate is 20% for most ..., success: True, files_to_display: [] INFO [Agent] 📄  Final Result: UK standard VAT rate: 20% UK reduced rate: 5% These are stated exactly as on the page at https://www.gov.uk/vat-rates (standard rate is 20% for most goods and services; reduced rate is 5% for some goods and services e.g. children’s car seats and home energy). INFO [Agent] ✅ Task completed successfully INFO [Agent] ⚠️ Agent reported success but judge thinks task failed ⚖️ Judge Verdict: ❌ FAIL Failure Reason: Agent did not report the rates exactly as stated on the page; added explanatory text not present in a direct quote. No evidence of reading the specific page text before concluding. Trajectory skipped verification steps. The user's task requires going to https://www.gov.uk/vat-rates and reporting the UK standard VAT rate and the reduced rate, exactly as stated on the page, then finishing. The agent navigated to the page successfully. However, the final output reports 'UK standard VAT rate: 20%' and 'UK reduced rate: 5%', which adds explanatory text in parentheses that is not 'exactly as stated on the page'. The actual page states the standard rate as '20%' (for most goods and services) and reduced rate as '5%' (for some goods and services), but the agent did not quote them verbatim without interpretation or extra details. The done action was called immediately after navigation without any reading/extracting tool use or verification steps visible in the trajectory. This violates the 'exactly as stated' requirement and shows insufficient tool usage or page interaction to confirm the precise wording. Task satisfaction is partial at best; output quality does not match the request for exact page text. Verdict is false due to not fulfilling the precise extraction and reporting criteria. INFO [BrowserSession] 📢 on_BrowserStopEvent - Calling reset() (force=True, keep_alive=None) INFO [BrowserSession] [SessionManager] Cleared all owned data (targets, sessions, mappings) INFO [BrowserSession] ✅ Browser session reset complete INFO [BrowserSession] ✅ Browser session reset complete =====FINAL===== UK standard VAT rate: 20% UK reduced rate: 5% These are stated exactly as on the page at https://www.gov.uk/vat-rates (standard rate is 20% for most goods and services; reduced rate is 5% for some goods and services e.g. children’s car seats and home energy). SUCCESS: True STEPS: 2 ELAPSED 7.4s USAGE {"total_prompt_tokens":11946,"total_prompt_cost":0.0,"total_prompt_cached_tokens":256,"total_prompt_cached_cost":0.0,"total_prompt_cache_creation_tokens":0,"total_prompt_cache_creation_cost":0.0,"total_completion_tokens":742,"total_completion_cost":0.0,"total_tokens":12688,"total_cost":0.0,"entry_count":2,"by_model":{"grok-4.20-0309-non-reasoning":{"model":"grok-4.20-0309-non-reasoning","prompt_tokens":11946,"completion_tokens":742,"total_tokens":12688,"cost":0.0,"invocations":2,"average_tokens_per_invocation":6344.0}}}