Seed 2.1 Turbo is 10.0× cheaper per million tokens (blended). Claude Opus 5 has the larger context window (1,000,000 vs 262,144 tokens, 3.8×).
Claude Opus 5 vs Seed 2.1 Turbo
Live catalog fields. Best-in-row is highlighted.
Claude Opus 5
Anthropic · anthropic__claude-opus-5
Seed 2.1 Turbo
Bytedance Seed · bytedance-seed__seed-2-1-turbo
Identity
| Field | anthropic__claude-opus-5 | bytedance-seed__seed-2-1-turbo |
|---|---|---|
| Provider | Anthropic | Bytedance Seed |
| Slug | anthropic__claude-opus-5 | bytedance-seed__seed-2-1-turbo |
| Status | live | live |
| Open weights | No | No |
| License | — | — |
| HuggingFace | — | — |
Quality
| Field | anthropic__claude-opus-5 | bytedance-seed__seed-2-1-turbo |
|---|---|---|
| Quality index (0–100) | 93.4 | — |
Cost
| Field | anthropic__claude-opus-5 | bytedance-seed__seed-2-1-turbo |
|---|---|---|
| Input $ / 1M tokens | $5.00 | $0.50 |
| Cached input $ / 1M | $0.50 | — |
| Output $ / 1M tokens | $25.00 | $2.50 |
Context
| Field | anthropic__claude-opus-5 | bytedance-seed__seed-2-1-turbo |
|---|---|---|
| Max context tokens | 1,000,000 | 262,144 |
| Max output tokens | 128,000 | 235,929 |
Modalities
| Field | anthropic__claude-opus-5 | bytedance-seed__seed-2-1-turbo |
|---|---|---|
| Input | text, image, file | text, image, video |
| Output | text | text |