Gemini 2.5 Flash vs Gemini 3.5
2026 - Pricing, benchmarks, and use case comparison
Quick take
- •Both models come from Google DeepMind. Gemini 2.5 Flash targets higher capability; Gemini 3.5 is the faster, cheaper tier.
Specs comparison
| Gemini 2.5 Flash | Gemini 3.5 | |
|---|---|---|
| Provider | Google DeepMind | Google DeepMind |
| Type | Closed source | Closed source |
| Context window | 1M | 1M |
| Input / 1M tokens | $0.075 | TBA |
| Output / 1M tokens | $0.30 | TBA |
| Release date | 2025-05 | 2026-05 |
Benchmarks
| Benchmark | Gemini 2.5 Flash | Gemini 3.5 |
|---|---|---|
| MMLU | ~89% | - |
| HumanEval | ~85% | - |
Scores sourced from official provider release posts.
Strengths
Gemini 2.5 Flash
- ✓Exceptional price-to-performance ratio
- ✓1M context at near-commodity pricing
- ✓Multimodal support at low cost
- ✓Fast inference latency
- ✓Strong summarization and classification
Gemini 3.5
- ✓Action-first architecture for agentic and multi-step workflows
- ✓1M token context window - largest in class
- ✓Powers Google Antigravity CLI for terminal-native coding
- ✓Native Workspace integration with autonomous task execution
- ✓Companion Gemini Omni handles anything-to-anything multimodal generation
Which should you choose?
Choose Gemini 2.5 Flash if you need...
- →High-volume, long-context tasks
- →Cost-sensitive production workloads
- →Document and media summarization
- →Retrieval-augmented pipelines
Choose Gemini 3.5 if you need...
- →Agentic workflows requiring multi-step tool use
- →Large codebase comprehension and editing
- →Google Workspace automation
- →Long document and multimodal analysis