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:
WARNING  [Agent] ❌ Result failed 1/6 times: Error code: 400 - {'code': 'invalid-argument', 'error': 'Model grok-4.20-0309-non-reasoning does not support parameter frequencyPenalty.'}
INFO     [Agent] 

INFO     [Agent] 📍 Step 2:
WARNING  [Agent] ❌ Result failed 2/6 times: Error code: 400 - {'code': 'invalid-argument', 'error': 'Model grok-4.20-0309-non-reasoning does not support parameter frequencyPenalty.'}
INFO     [Agent] 

INFO     [Agent] 📍 Step 3:
WARNING  [Agent] ❌ Result failed 3/6 times: Error code: 400 - {'code': 'invalid-argument', 'error': 'Model grok-4.20-0309-non-reasoning does not support parameter frequencyPenalty.'}
INFO     [Agent] 

INFO     [Agent] 📍 Step 4:
WARNING  [Agent] ❌ Result failed 4/6 times: Error code: 400 - {'code': 'invalid-argument', 'error': 'Model grok-4.20-0309-non-reasoning does not support parameter frequencyPenalty.'}
INFO     [Agent] 

INFO     [Agent] 📍 Step 5:
INFO     [Agent] 📋 Exploration nudge injected after 5 steps without a plan
WARNING  [Agent] ❌ Result failed 5/6 times: Error code: 400 - {'code': 'invalid-argument', 'error': 'Model grok-4.20-0309-non-reasoning does not support parameter frequencyPenalty.'}
INFO     [Agent] 

INFO     [Agent] 📍 Step 6:
INFO     [Agent] Step budget warning: 6/8 (75%)
INFO     [Agent] 📋 Exploration nudge injected after 6 steps without a plan
INFO     [Agent] 🔁 Loop detection nudge injected (repetition=0, stagnation=5)
ERROR    [Agent] ❌ Result failed 6/6 times: Error code: 400 - {'code': 'invalid-argument', 'error': 'Model grok-4.20-0309-non-reasoning does not support parameter frequencyPenalty.'}
ERROR    [Agent] ❌ Stopping due to 5 consecutive failures
INFO     [Agent] 
INFO     [Agent] Did the Agent not work as expected? Let us fix this!
INFO     [Agent]    Open a short issue on GitHub: https://github.com/browser-use/browser-use/issues
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=====
 None 
SUCCESS: None STEPS: 7 ELAPSED 5.4s
USAGE {"total_prompt_tokens":0,"total_prompt_cost":0.0,"total_prompt_cached_tokens":0,"total_prompt_cached_cost":0.0,"total_prompt_cache_creation_tokens":0,"total_prompt_cache_creation_cost":0.0,"total_completion_tokens":0,"total_completion_cost":0.0,"total_tokens":0,"total_cost":0.0,"entry_count":0,"by_model":{}}