Gemini 3.5 Flash is 2.9× cheaper per million tokens (blended). Quality indexes are essentially tied. Gemini 3.5 Flash has the larger context window (1,048,576 vs 200,000 tokens, 5.2×).
Claude Opus 4.5 vs Gemini 3.5 Flash
Live catalog fields. Best-in-row is highlighted.
Claude Opus 4.5
Anthropic · anthropic__claude-opus-4.5
Gemini 3.5 Flash
Google · google__gemini-3.5-flash
Identity
| Field | anthropic__claude-opus-4.5 | google__gemini-3.5-flash |
|---|---|---|
| Provider | Anthropic | |
| Slug | anthropic__claude-opus-4.5 | google__gemini-3.5-flash |
| Status | live | live |
| Open weights | No | No |
| License | — | — |
| HuggingFace | — | — |
Quality
| Field | anthropic__claude-opus-4.5 | google__gemini-3.5-flash |
|---|---|---|
| Quality index (0–100) | 82.3 | 82.7 |
Cost
| Field | anthropic__claude-opus-4.5 | google__gemini-3.5-flash |
|---|---|---|
| Input $ / 1M tokens | $5.00 | $1.50 |
| Cached input $ / 1M | $0.50 | $0.15 |
| Output $ / 1M tokens | $25.00 | $9.00 |
Context
| Field | anthropic__claude-opus-4.5 | google__gemini-3.5-flash |
|---|---|---|
| Max context tokens | 200,000 | 1,048,576 |
| Max output tokens | 64,000 | 65,536 |
Modalities
| Field | anthropic__claude-opus-4.5 | google__gemini-3.5-flash |
|---|---|---|
| Input | file, image, text | text, image, video, file, audio |
| Output | text | text |