Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows. It delivers state-of-the-art performance on coding benchmarks such as SWE-bench Verified, with...
Model details →Anthropic: Claude Sonnet 4.5 vs Google: Gemini 3.8 Flash
Google: Gemini 3.8 Flash wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
Gemini 3.8 Flash is Google's most intelligent Flash model with significant gains from 3.7 Flash across software engineering, agentic tasks, and multi-step reasoning.
Model details →Side-by-side comparison
| Capability | Anthropic: Claude Sonnet 4.5 | Google: Gemini 3.8 Flash | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1M | 1.0M | 🏆 Google: Gemini 3.8 Flash |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $3.00 | $0.75 | 🏆 Google: Gemini 3.8 Flash |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $15.00 | $3.75 | 🏆 Google: Gemini 3.8 Flash |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is Anthropic: Claude Sonnet 4.5 better than Google: Gemini 3.8 Flash?
Google: Gemini 3.8 Flash wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between Anthropic: Claude Sonnet 4.5 and Google: Gemini 3.8 Flash?
Input: $3.00 vs $0.75 per 1M tokens. Output: $15.00 vs $3.75 per 1M tokens.
What context windows do Anthropic: Claude Sonnet 4.5 and Google: Gemini 3.8 Flash support?
Anthropic: Claude Sonnet 4.5 supports up to 1M tokens. Google: Gemini 3.8 Flash supports up to 1.0M tokens.
Do both Anthropic: Claude Sonnet 4.5 and Google: Gemini 3.8 Flash support tool calling?
Anthropic: Claude Sonnet 4.5: yes. Google: Gemini 3.8 Flash: yes.