NeMo Agent Toolkit failed to use OpenAI gpt-oss:20b

Dear all,

I would like to use OpenAI gpt-oss:20b with NeMo Agent Toolkit but it prompted error and failed to run as gpt-oss:20b is a thinking model.

Do anyone know how can I use gpt-oss:20b with NeMo Agent Toolkit? I tested with gemma3:4b and gemma3:12b without any problem..

Many Thanks,

Victor

2025-08-11 19:00:46,672 - aiq.agent.react_agent.agent - INFO -

[AGENT]Agent input: Dear [Customer], Thank you for your purchase on [Date]. We have processed a refund of 0 to your account. Please provide your account and routing numbers so we can complete the transaction. Thank you, [Your Company]Agent’s thoughts:

2025-08-11 19:00:46,674 - aiq.agent.react_agent.agent - INFO - [AGENT] Retrying ReAct Agent, including output parsing Observation

2025-08-11 19:00:48,728 - aiq.agent.react_agent.agent - INFO -

[AGENT]Agent input: Dear [Customer], Thank you for your purchase on [Date]. We have processed a refund of 0 to your account. Please provide your account and routing numbers so we can complete the transaction. Thank you, [Your Company]Agent’s thoughts:

2025-08-11 19:00:48,729 - aiq.agent.react_agent.agent - INFO - [AGENT] Retrying ReAct Agent, including output parsing Observation

2025-08-11 19:00:50,108 - aiq.agent.react_agent.agent - INFO -

[AGENT]Agent input: Dear [Customer], Thank you for your purchase on [Date]. We have processed a refund of 0 to your account. Please provide your account and routing numbers so we can complete the transaction. Thank you, [Your Company]Agent’s thoughts:

2025-08-11 19:00:50,109 - aiq.agent.react_agent.agent - WARNING - [AGENT] Failed to parse agent output after 3 attempts, consider enabling or increasing parse_agent_response_max_retries

[AGENT] Failed to parse agent output after 3 attempts, consider enabling or increasing parse_agent_response_max_retries2025-08-11 19:00:50,116 - aiq.front_ends.console.console_front_end_plugin - INFO -

Workflow Result:

[“Invalid Format: Missing ‘Action:’ after ‘Thought:’\n”]