Google Gemini 2.0 Flash Thinking — Advanced Reasoning at $0.075/M Tokens (200x Cheaper than o1)

Google released Gemini 2.0 Flash Thinking on Vertex AI — a reasoning model competitive with OpenAI o1 and DeepSeek R1. Pricing: $0.075/million input tokens and $0.30/million output tokens. Flash Thinking uses extended thinking chains internally for complex multi-step reasoning while returning only the final answer, keeping response times practical.

Price comparison for reasoning models: OpenAI o1 at $15/$60 per million tokens. Claude claude-sonnet-4-20250514 at $3/$15. Gemini 2.0 Flash at $0.075/$0.30 (standard, non-thinking). Flash Thinking at $0.075/$0.30 — same price as standard Flash but with reasoning capability. This is 200x cheaper than o1 for the same class of task.

TCOIQ Action: For complex reasoning tasks (code review, mathematical analysis, multi-step planning, data analysis), test Flash Thinking before using o1 or Claude. At 1 billion tokens/month: Flash Thinking = $337 vs o1 = $67,500. Even at 50% quality degradation vs o1, the cost case is overwhelming. Run A/B quality benchmarks on your specific tasks.