Claude Opus 5 vs Seed 2.1 Turbo

Price, context window & benchmark comparison

A

Claude Opus 5

Anthropic
$5.00 / $25.00
Input / Output · per 1M tokens
VS
B

Seed 2.1 Turbo

ByteDance Seed
$0.50 / $2.50
Input / Output · per 1M tokens
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A
B
Verdict: Seed 2.1 Turbo is 10.0× cheaper than Claude Opus 5 on a typical 3:1 input/output mix. Claude Opus 5 has the larger context window (1M vs 262K).
Claude Opus 5Seed 2.1 Turbo
Input price / 1M$5.00$0.50
Output price / 1M$25.00$2.50
Blended price (3:1)$10.00$1.00
Cached input / 1M$0.50
Context window1M262K
Max output128K236K
Intelligence index50.8
Coding index78
Providers111
Best provider uptime (30m)100.0%100.0%
Vision inputYesYes
ReasoningYesYes
Tool callingYesYes
Released2026-07-242026-08-12
Retirement

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FAQ

Which is cheaper, Claude Opus 5 or Seed 2.1 Turbo?

Seed 2.1 Turbo is 10.0× cheaper than Claude Opus 5 on a typical 3:1 input/output mix.

Claude Opus 5 vs Seed 2.1 Turbo: which has a bigger context window?

Claude Opus 5: 1,000,000 tokens. Seed 2.1 Turbo: 262,144 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: Claude Opus 5 ≈ $22,500, Seed 2.1 Turbo ≈ $2,250.

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