Model Comparison

Claude 3.5 Haiku vs Seed 2.0 ProWhich is better in 2026?

Seed 2.0 Pro significantly outperforms across most benchmarks.

Verdict: Claude 3.5 Haiku vs Seed 2.0 Pro — which is better?

Claude 3.5 Haiku (by Anthropic) and Seed 2.0 Pro (by ByteDance) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Claude 3.5 Haiku outperforms in 0 benchmarks, while Seed 2.0 Pro is better at 2 benchmarks (GPQA, SWE-Bench Verified). Seed 2.0 Pro significantly outperforms across most benchmarks.

Choose Claude 3.5 Haiku if…

  • you want predictable pricing at $0.80/M input and $4.00/M output

Choose Seed 2.0 Pro if…

  • you want the strongest raw capability — it leads on 2 of 2 shared benchmarks
  • you want the most recent training data — it shipped Feb 2026
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Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

Claude 3.5 Haiku outperforms in 0 benchmarks, while Seed 2.0 Pro is better at 2 benchmarks (GPQA, SWE-Bench Verified).

Seed 2.0 Pro significantly outperforms across most benchmarks.

Mon Jun 15 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only Claude 3.5 Haiku specifies input context (200,000 tokens). Only Claude 3.5 Haiku specifies output context (200,000 tokens).

Anthropic
Claude 3.5 Haiku
Input200,000 tokens
Output200,000 tokens
ByteDance
Seed 2.0 Pro
Input- tokens
Output- tokens
Mon Jun 15 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Seed 2.0 Pro supports multimodal inputs, whereas Claude 3.5 Haiku does not.

Seed 2.0 Pro can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude 3.5 Haiku

Text
Images
Audio
Video

Seed 2.0 Pro

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 3.5 Haiku

Proprietary

Closed source

Seed 2.0 Pro

Proprietary

Closed source

Release Timeline

When each model was launched

Claude 3.5 Haiku was released on 2024-10-22, while Seed 2.0 Pro was released on 2026-02-14.

Seed 2.0 Pro is 16 months newer than Claude 3.5 Haiku.

Claude 3.5 Haiku

Oct 22, 2024

1.6 years ago

Seed 2.0 Pro

Feb 14, 2026

4 months ago

1.3yr newer

Knowledge Cutoff

When training data ends

Seed 2.0 Pro has a documented knowledge cutoff of 2024-01-01, while Claude 3.5 Haiku's cutoff date is not specified.

We can confirm Seed 2.0 Pro's training data extends to 2024-01-01, but cannot make a direct comparison without Claude 3.5 Haiku's cutoff date.

Claude 3.5 Haiku

—

Seed 2.0 Pro

Jan 2024

Outputs Comparison

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Key Takeaways

Anthropic
Larger context window (200,000 tokens)
ByteDance
Supports multimodal inputs
Higher GPQA score (88.9% vs 41.6%)
Higher SWE-Bench Verified score (76.5% vs 40.6%)

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude 3.5 Haiku
ByteDance
Seed 2.0 Pro

FAQ

Common questions about Claude 3.5 Haiku vs Seed 2.0 Pro.

Which is better, Claude 3.5 Haiku or Seed 2.0 Pro?

Seed 2.0 Pro significantly outperforms across most benchmarks. Claude 3.5 Haiku is made by Anthropic and Seed 2.0 Pro is made by ByteDance. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude 3.5 Haiku compare to Seed 2.0 Pro in benchmarks?

Claude 3.5 Haiku scores HumanEval: 88.1%, MGSM: 85.6%, DROP: 83.1%, MATH: 69.4%, MMLU-Pro: 65.0%. Seed 2.0 Pro scores AIME 2025: 98.3%, AIME 2026: 94.2%, GPQA: 88.9%, LiveCodeBench v6: 87.8%, BrowseComp: 77.3%.

What are the context window sizes for Claude 3.5 Haiku and Seed 2.0 Pro?

Claude 3.5 Haiku supports 200K tokens and Seed 2.0 Pro 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 3.5 Haiku and Seed 2.0 Pro?

Key differences include multimodal support (no vs yes). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude 3.5 Haiku and Seed 2.0 Pro?

Claude 3.5 Haiku is developed by Anthropic and Seed 2.0 Pro is developed by ByteDance.

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