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Claude Haiku 5.5 vs Seed 2.0 Pro

Claude Haiku 5.5 leads the LLM Stats Score 49.9 to 39.1. Claude Haiku 5.5 is 5.6x cheaper per token.

Anthropic · ByteDance · Updated for 2026

Which is better?

Claude Haiku 5.5 leads the overall LLM Stats Score 49.9 to 39.1, ranking #20 overall.

On price, Claude Haiku 5.5 is roughly 5.6x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Claude Haiku 5.5 also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.

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

Choose Claude Haiku 5.5

  • overall performance matters — it scores 49.9 and ranks #20 on LLM Stats
  • your work emphasizes reasoning — it leads those capability indexes
  • cost matters — it's about 5.6x cheaper per token
  • you process long inputs — it offers a 1,000,000 token context window
  • you want the most recent training data — it shipped Oct 2026

Choose Seed 2.0 Pro

  • you want predictable pricing at $0.50/M input and $3.00/M output

At a glance

The differences that matter most.

Claude Haiku 5.5
Anthropic
Seed 2.0 Pro
ByteDance
Core performance indexes
LLM Stats Score
49.9
#20
39.1
#75
Reasoning
47.5
#25
38.7
#76
Coding
39.2
#15
21.9
#101
Agents
33.8
#33
17.3
#96
Cost, coverage & limits
Benchmark wins
—
—
Input price
$0.10 / M
$0.50 / M
Output price
$0.50 / M
$3.00 / M
Context window
1,000,000
256,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Claude Haiku 5.5
Seed 2.0 Pro
Math
29.0#95
32.1#67
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

36 reported for Claude Haiku 5.5 · 6 for Seed 2.0 Pro

No common benchmarks found

Claude Haiku 5.5 and Seed 2.0 Prodon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Claude Haiku 5.5 costs less

For input processing, Claude Haiku 5.5 ($0.10/1M tokens) is 5.0x cheaper than Seed 2.0 Pro ($0.50/1M tokens).

For output processing, Claude Haiku 5.5 ($0.50/1M tokens) is 6.0x cheaper than Seed 2.0 Pro ($3.00/1M tokens).

In conclusion, Seed 2.0 Pro is more expensive than Claude Haiku 5.5.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Fri Oct 23 2026 • llm-stats.com
Anthropic
Claude Haiku 5.5
Input tokens$0.10
Output tokens$0.50
Best providerAnthropic
ByteDance
Seed 2.0 Pro
Input tokens$0.50
Output tokens$3.00
Best providerDeepinfra
Notice missing or incorrect data?

Context Window

Maximum input and output token capacity

Claude Haiku 5.5 accepts 1,000,000 input tokens compared to Seed 2.0 Pro's 256,000 tokens. Seed 2.0 Pro can generate longer responses up to 131,072 tokens, while Claude Haiku 5.5 is limited to 128,000 tokens.

Anthropic
Claude Haiku 5.5
Input1,000,000 tokens
Output128,000 tokens
ByteDance
Seed 2.0 Pro
Input256,000 tokens
Output131,072 tokens
Fri Oct 23 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Haiku 5.5 and Seed 2.0 Pro support multimodal inputs.

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

Claude Haiku 5.5

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 Haiku 5.5

Proprietary

Closed source

Seed 2.0 Pro

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Haiku 5.5 was released on 2026-10-07, while Seed 2.0 Pro was released on 2026-02-14.

Claude Haiku 5.5 is 8 months newer than Seed 2.0 Pro.

Claude Haiku 5.5

Oct 7, 2026

1 weeks ago

7mo newer
Seed 2.0 Pro

Feb 14, 2026

8 months ago

Knowledge Cutoff

When training data ends

Claude Haiku 5.5 has a knowledge cutoff of 2026-06-01, while Seed 2.0 Pro has a cutoff of 2024-01-01.

Claude Haiku 5.5 has more recent training data (up to 2026-06-01), making it potentially better informed about events through that date compared to Seed 2.0 Pro (2024-01-01).

Claude Haiku 5.5

Jun 2026

2.4 yr newer
Seed 2.0 Pro

Jan 2024

Provider Availability

Claude Haiku 5.5 is available from Anthropic. Seed 2.0 Pro is available from DeepInfra.

Claude Haiku 5.5

anthropic logo
Anthropic
Input Price:Input: $0.10/1MOutput Price:Output: $0.50/1M

Seed 2.0 Pro

deepinfra logo
Deepinfra
Input Price:Input: $0.50/1MOutput Price:Output: $3.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Claude Haiku 5.5 and Seed 2.0 Pro side-by-side, then vote on the output you prefer.

Claude Haiku 5.5
✓ Preferred
Seed 2.0 Pro
Open in Playground

FAQ

Common questions about Claude Haiku 5.5 vs Seed 2.0 Pro.

Which is better, Claude Haiku 5.5 or Seed 2.0 Pro?

Claude Haiku 5.5 leads the LLM Stats Score 49.9 to 39.1. Claude Haiku 5.5 is made by Anthropic and Seed 2.0 Pro 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 Haiku 5.5 compare to Seed 2.0 Pro in benchmarks?

Claude Haiku 5.5 scores Global-MMLU: 87.8%, MILU: 87.6%, BenchCAD (with Python tool): 87.0%, Chartography: 86.2%, SWE-bench Multilingual: 83.7%. Seed 2.0 Pro scores AIME 2025: 98.3%, AIME 2026: 94.2%, GPQA: 88.9%, LiveCodeBench v6: 87.8%, BrowseComp: 77.3%.

Is Claude Haiku 5.5 cheaper than Seed 2.0 Pro?

Claude Haiku 5.5 is 5.0x cheaper for input tokens. Claude Haiku 5.5 costs $0.10/M input and $0.50/M output via anthropic. Seed 2.0 Pro costs $0.50/M input and $3.00/M output via deepinfra.

What are the context window sizes for Claude Haiku 5.5 and Seed 2.0 Pro?

Claude Haiku 5.5 supports 1.0M tokens and Seed 2.0 Pro supports 256K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Haiku 5.5 and Seed 2.0 Pro?

Key differences include LLM Stats Score (49.9 vs 39.1), context window (1.0M vs 256K), input pricing ($0.10 vs $0.50/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Haiku 5.5 and Seed 2.0 Pro?

Claude Haiku 5.5 is developed by Anthropic and Seed 2.0 Pro is developed by ByteDance.

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