Claude Sonnet 5 vs Gemini 3.5 Flash
Claude Sonnet 5 and Gemini 3.5 Flash are compared here as a decision page: who makes each product, how they relate in the catalog, and which official sources to check for current plans and capabilities. Both sit in Frontier models. Feature checkmarks and numeric scores are omitted unless they come from a first-party source.
Key differences
| Dimension | Claude Sonnet 5 | Gemini 3.5 Flash |
|---|---|---|
| Product | Claude Sonnet 5 | Gemini 3.5 Flash |
| Company | Anthropic | |
| Category | Frontier models | Frontier models |
| Focus | General / coding / agents | General / agentic |
| Official site | Linked below | Linked below |
Specs and prices below come from the same sourced tables as the product pages. If a cell is empty, the vendor page could not be retrieved.
Pricing
Claude Sonnet 5
| Plan | Price | Billing | Notes |
|---|---|---|---|
| API input | $2 / 1M input tokens | usage | Per million input tokens. |
| API output | $10 / 1M output tokens | usage | Per million output tokens. |
Retrieved 2026-08-21 from claude.com/pricing. Confirm on the official page before buying — vendors change plans without notice.
Gemini 3.5 Flash
No official pricing table could be retrieved for this product. Plans change; use the vendor’s own page.
Specifications
Claude Sonnet 5
- API price
- $2 / $10 per million input/output tokens
- Availability
- Claude API and Claude apps
Retrieved 2026-08-21 from claude.com/pricing.
Gemini 3.5 Flash
No official specification rows could be retrieved. Context windows, modalities, and API ids belong on the vendor docs.
Best for
Claude Sonnet 5
Start here if you already work in Frontier models and this is the product you know. Confirm fit on the official site.
Gemini 3.5 Flash
Use the official site to see how Gemini 3.5 Flash differs on models, plans, and workflow — not invented scores.
Continue
Sources
Product facts link out to first-party pages. Check the official source for the current details.