Name of the model to use. Premium models are charged at 10x the rate of standard models, they include: anthropic/claude-3.5-sonnet, anthropic/claude-sonnet-4.5, openai/gpt-4.1, meta-llama/llama-3.2-90b-vision-instruct, google/gemini-pro-1.5, anthropic/claude-3-5-haiku, anthropic/claude-haiku-5.5, openai/gpt-4o, anthropic/claude-3.7-sonnet, google/gemini-2.5-pro, openai/o3, openai/gpt-5-chat. Default value: "google/gemini-2.5-flash-lite"
Possible enum values: anthropic/claude-sonnet-4.5, anthropic/claude-haiku-5.5, anthropic/claude-3.7-sonnet, anthropic/claude-3.5-sonnet, anthropic/claude-3-5-haiku, anthropic/claude-3-haiku, google/gemini-pro-1.5, google/gemini-flash-1.5, google/gemini-flash-1.5-8b, google/gemini-2.0-flash-001, google/gemini-2.5-flash, google/gemini-2.5-flash-lite, google/gemini-2.5-pro, meta-llama/llama-3.2-1b-instruct, meta-llama/llama-3.2-3b-instruct, meta-llama/llama-3.1-8b-instruct, meta-llama/llama-3.1-70b-instruct, openai/gpt-oss-120b, openai/gpt-4o-mini, openai/gpt-4o, openai/gpt-4.1, openai/o3, openai/gpt-5-chat, openai/gpt-5-mini, openai/gpt-5-nano, meta-llama/llama-4-maverick, meta-llama/llama-4-scout, moonshotai/kimi-k2.5