Gemini 2.0 Flash Thinking Exp 01 21 Preview Details
Google released the gemini-2.0-flash-thinking-exp-01-21 preview on January 21, 2025. This article outlines documented capabilities and evaluation steps.
Official Release Announcement
Google officially released the model identifier gemini-2.0-flash-thinking-exp-01-21 on January 21, 2025. According to the official changelog, this release constitutes the latest preview version of the model underlying the Gemini 2.0 Flash Thinking Model. The event is recorded with date precision, marking the specific day the update was made available in the API documentation.
Documented Capabilities and Limitations
The source facts confirm that the model accepts text and image inputs and produces text outputs. It belongs to the Gemini family provided by Google. The record indicates that open weights are not confirmed for this release. No information regarding pricing, context window size, or maximum output tokens is present in the verified data. Additionally, the source notes a deprecation announcement stating that this specific model version will be shut down on December 2nd, though the year for this shutdown is not explicitly detailed in the provided excerpt beyond the context of the changelog entry.
- Input modalities: Text and Image
- Output modality: Text
- Open weights status: Not confirmed
- Pricing and context limits: Not specified
Evaluation Procedure for Engineers
To evaluate this preview model, engineers should design a controlled testing environment. First, test the model using a standardized set of prompts that include both textual queries and image-based inputs to verify multimodal processing. Measure the response latency and token usage for each request. Compare these metrics against baseline expectations or previous stable versions if available in your internal benchmarks. Validate the consistency of the text outputs across multiple runs to assess stability. Since the source does not provide performance rankings or guaranteed benefits, any observed improvements must be derived from your own empirical measurements rather than assumed from the release notes.
Artificial Analysis benchmark review
Benchmark review updated on . These scores apply to the linked artifact and recorded methodology; they do not establish the performance of a different runtime or quantized model.
| Measurement | Recorded result | Measured |
|---|---|---|
| Artificial Analysis Coding Index (v4.1) ↗ | 24.1 index_points | 2026-08-09 |
| Artificial Analysis Coding Index (v4.2) ↗ | 24.1 index_points | 2026-09-05 |
| Artificial Analysis Coding Index (v4.3) ↗ | 24.1 index_points | 2026-09-09 |
| Artificial Analysis Intelligence Index (v4.1) ↗ | 13.3 index_points | 2026-08-09 |
| Artificial Analysis Intelligence Index (v4.2) ↗ | 7.4 index_points | 2026-09-05 |
| Artificial Analysis Intelligence Index (v4.3) ↗ | 9.4 index_points | 2026-09-09 |
Review the full benchmark provenance and source methodology →
Primary sources
Frequently asked questions
What is the exact release date of this model?
The model gemini-2.0-flash-thinking-exp-01-21 was released on January 21, 2025, as stated in the official Google AI changelog.
Does the source confirm local installation options?
No. The source states that open weights are not confirmed. It does not establish whether local installation is possible or impossible, nor does it mandate API-only access. The hosting arrangement remains unspecified in the provided facts.