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Claude Opus 4.6 vs Seed 2.1 Turbo

Claude Opus 4.6 and Seed 2.1 Turbo are closely matched at 44.7 and 43.0 on the LLM Stats Score.

Anthropic · ByteDance · Updated for 2026

Which is better?

Claude Opus 4.6 and Seed 2.1 Turbo are closely matched on the overall LLM Stats Score at 44.7 and 43.0.

In the 7 individual benchmarks reported for both models, Seed 2.1 Turbo wins 6; this is a narrower head-to-head signal than the composite indexes.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Claude Opus 4.6

  • you want predictable pricing at $5.00/M input and $25.00/M output

Choose Seed 2.1 Turbo

  • you value its reported benchmark strengths — it wins 6 of 7 exact shared results
  • you want the most recent training data — it shipped Jun 2026

At a glance

The differences that matter most.

Claude Opus 4.6
Anthropic
Seed 2.1 Turbo
ByteDance
Core performance indexes
LLM Stats Score
44.7
#38
43.0
#48
Reasoning
45.3
#32
44.4
#37
Coding
32.2
#44
30.5
#53
Agents
27.6
#49
28.9
#44
Cost, coverage & limits
Benchmark wins
1 of 7
6 of 7
Input price
$5.00 / M
— / M
Output price
$25.00 / M
— / M
Context window
1,000,000
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

5 shared
Index
Claude Opus 4.6
Seed 2.1 Turbo
Math
40.1#15
39.6#18
Vision
27.2#41
30.4#32
Tool use
23.6#37
19.3#61
Long context
24.5#15
29.8#6
Multimodal
23.4#62
33.5#17
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

27 reported for Claude Opus 4.6 · 90 for Seed 2.1 Turbo

7 shared

Claude Opus 4.6 outperforms in 1 benchmarks (CyberGym), while Seed 2.1 Turbo is better at 6 benchmarks (BrowseComp, CharXiv-R, Humanity's Last Exam, MCP Atlas, MMMU-Pro, OSWorld).

Seed 2.1 Turbo significantly outperforms across most benchmarks.

Fri Oct 02 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Claude Opus 4.6 specifies input context (1,000,000 tokens). Only Claude Opus 4.6 specifies output context (128,000 tokens).

Anthropic
Claude Opus 4.6
Input1,000,000 tokens
Output128,000 tokens
ByteDance
Seed 2.1 Turbo
Input- tokens
Output- tokens
Fri Oct 02 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Opus 4.6 and Seed 2.1 Turbo support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Claude Opus 4.6

Text
Images
Audio
Video

Seed 2.1 Turbo

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude Opus 4.6

Proprietary

Closed source

Seed 2.1 Turbo

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Opus 4.6 was released on 2026-02-05, while Seed 2.1 Turbo was released on 2026-06-24.

Seed 2.1 Turbo is 5 months newer than Claude Opus 4.6.

Claude Opus 4.6

Feb 5, 2026

7 months ago

Seed 2.1 Turbo

Jun 24, 2026

3 months ago

4mo newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Claude Opus 4.6 and Seed 2.1 Turbo side-by-side, then vote on the output you prefer.

Claude Opus 4.6
✓ Preferred
Seed 2.1 Turbo
Open in Playground

FAQ

Common questions about Claude Opus 4.6 vs Seed 2.1 Turbo.

Which is better, Claude Opus 4.6 or Seed 2.1 Turbo?

Claude Opus 4.6 and Seed 2.1 Turbo are closely matched on the LLM Stats Score at 44.7 and 43.0. Claude Opus 4.6 is made by Anthropic and Seed 2.1 Turbo is made by ByteDance. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Opus 4.6 compare to Seed 2.1 Turbo in benchmarks?

Claude Opus 4.6 scores Vending-Bench 2: 100.0%, AIME 2025: 99.8%, Tau2 Telecom: 99.3%, Graphwalks parents >128k: 95.4%, Tau2 Retail: 91.9%. Seed 2.1 Turbo scores CharXiv-D: 94.6%, MathVision: 92.7%, MathVista: 90.5%, MathVerse: 89.2%, Video-MME: 89.0%.

What are the context window sizes for Claude Opus 4.6 and Seed 2.1 Turbo?

Claude Opus 4.6 supports 1.0M tokens and Seed 2.1 Turbo supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Opus 4.6 and Seed 2.1 Turbo?

Key differences include LLM Stats Score (44.7 vs 43.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Opus 4.6 and Seed 2.1 Turbo?

Claude Opus 4.6 is developed by Anthropic and Seed 2.1 Turbo is developed by ByteDance.

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