Curiosity · AI Model
Gemini 2.0 Flash Thinking
Gemini 2.0 Flash Thinking is Google's first experimental reasoning model, released December 2024. Built on the 2.0 Flash architecture, it surfaces the model's chain of thought before producing a final answer — letting developers see the reasoning steps and delivering meaningful gains on math, physics, and coding benchmarks.
Model specs
- Vendor
- Family
- Gemini 2.0
- Released
- 2024-12
- Context window
- 1,000,000 tokens
- Modalities
- text, vision, code
Strengths
- First public Gemini model to expose structured chain-of-thought
- Strong gains on math and science benchmarks vs. plain 2.0 Flash
- Helped seed the reasoning-model practices later used in 2.5 Pro/Flash
- Free tier access via AI Studio during the experimental period
Limitations
- Experimental — no SLA, rate limits, or stable pricing
- Surpassed by Gemini 2.5 Flash and Pro with built-in thinking budget
- Reasoning transparency can leak internal deliberation you may not want to show users
- No tool use inside reasoning in the initial release
Use cases
- Math and physics problem solving where CoT is helpful
- Research and demonstration of reasoning-model behaviour
- Educational apps that show students step-by-step reasoning
- Early experimentation with Google's reasoning stack
Benchmarks
| Benchmark | Score | As of |
|---|---|---|
| AIME 2024 (math) | ≈73% | 2024-12 |
| GPQA Diamond | ≈74% | 2024-12 |
| MATH-500 | ≈90% | 2024-12 |
Frequently asked questions
What is Gemini 2.0 Flash Thinking?
Gemini 2.0 Flash Thinking is Google's experimental December 2024 reasoning model — a variant of 2.0 Flash that emits a visible chain-of-thought before its final answer, inspired by OpenAI's o1 and other thinking-model releases.
Is Gemini 2.0 Flash Thinking still the best Gemini reasoning model?
No — Gemini 2.5 Flash and Gemini 2.5 Pro both include a tunable thinking budget that outperforms 2.0 Flash Thinking on every major benchmark. The 2.0 Flash Thinking release is mostly historically important.
Can I use Gemini 2.0 Flash Thinking in production?
Google positioned it as experimental, and as of April 2026 it is superseded by 2.5 Flash with thinking. For production reasoning workloads, use Gemini 2.5 Flash or 2.5 Pro.
Does Gemini 2.0 Flash Thinking support tools?
The initial experimental release did not include tool use inside the chain of thought. Full tool-use reasoning arrived with the Gemini 2.5 family.
Sources
- Google — Gemini 2.0 Flash Thinking — accessed 2026-04-20
- Google — Gemini 2.0 update — accessed 2026-04-20