Model Comparison

Kimi K3 vs Seed 2.0 ProWhich is better in 2026?

Kimi K3 significantly outperforms across most benchmarks. Seed 2.0 Pro is 5.3x cheaper per token.

Verdict: Kimi K3 vs Seed 2.0 Pro — which is better?

Kimi K3 (by Moonshot AI) 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.

Kimi K3 outperforms in 2 benchmarks (BrowseComp, GPQA), while Seed 2.0 Pro is better at 0 benchmarks. Kimi K3 significantly outperforms across most benchmarks.

On price, Seed 2.0 Pro is roughly 5.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Kimi K3 also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

Choose Kimi K3 if…

  • you want the strongest raw capability — it leads on 2 of 2 shared benchmarks
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Jul 2026

Choose Seed 2.0 Pro if…

  • cost matters — it's about 5.3x cheaper per token

Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

Kimi K3 outperforms in 2 benchmarks (BrowseComp, GPQA), while Seed 2.0 Pro is better at 0 benchmarks.

Kimi K3 significantly outperforms across most benchmarks.

Wed Jul 22 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Seed 2.0 Pro costs less

For input processing, Kimi K3 ($3.00/1M tokens) is 6.0x more expensive than Seed 2.0 Pro ($0.50/1M tokens).

For output processing, Kimi K3 ($15.00/1M tokens) is 5.0x more expensive than Seed 2.0 Pro ($3.00/1M tokens).

In conclusion, Kimi K3 is more expensive than Seed 2.0 Pro.*

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

Lowest available price from all providers
Wed Jul 22 2026 • llm-stats.com
Moonshot AI
Kimi K3
Input tokens$3.00
Output tokens$15.00
Best providerUnknown Organization
ByteDance
Seed 2.0 Pro
Input tokens$0.50
Output tokens$3.00
Best providerDeepinfra
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Kimi K3 accepts 1,048,576 input tokens compared to Seed 2.0 Pro's 256,000 tokens. Kimi K3 can generate longer responses up to 1,048,576 tokens, while Seed 2.0 Pro is limited to 65,536 tokens.

Moonshot AI
Kimi K3
Input1,048,576 tokens
Output1,048,576 tokens
ByteDance
Seed 2.0 Pro
Input256,000 tokens
Output65,536 tokens
Wed Jul 22 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Kimi K3 and Seed 2.0 Pro support multimodal inputs.

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

Kimi K3

Text
Images
Audio
Video

Seed 2.0 Pro

Text
Images
Audio
Video

Release Timeline

When each model was launched

Kimi K3 was released on 2026-07-16, while Seed 2.0 Pro was released on 2026-02-14.

Kimi K3 is 5 months newer than Seed 2.0 Pro.

Kimi K3

Jul 16, 2026

6 days ago

5mo newer
Seed 2.0 Pro

Feb 14, 2026

5 months ago

Knowledge Cutoff

When training data ends

Seed 2.0 Pro has a documented knowledge cutoff of 2024-01-01, while Kimi K3'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 Kimi K3's cutoff date.

Kimi K3

—

Seed 2.0 Pro

Jan 2024

Provider Availability

Kimi K3 is available from Moonshot AI. Seed 2.0 Pro is available from DeepInfra.

Kimi K3

moonshot logo
Unknown Organization
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M

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?Start an Issue discussion→

Key Takeaways

Moonshot AI
Larger context window (1,048,576 tokens)
Has open weights
Higher BrowseComp score (91.2% vs 77.3%)
Higher GPQA score (93.5% vs 88.9%)
ByteDance
Less expensive input tokens
Less expensive output tokens

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Kimi K3 and Seed 2.0 Pro side-by-side, then vote on the output you prefer.

Kimi K3
✓ Preferred
Seed 2.0 Pro
Open in Playground
AI Model Comparison Table
Feature
Moonshot AI
Kimi K3
ByteDance
Seed 2.0 Pro

FAQ

Common questions about Kimi K3 vs Seed 2.0 Pro.

Which is better, Kimi K3 or Seed 2.0 Pro?

Kimi K3 significantly outperforms across most benchmarks. Kimi K3 is made by Moonshot AI 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 Kimi K3 compare to Seed 2.0 Pro in benchmarks?

Kimi K3 scores MathVision: 97.8%, DeepSearchQA: 95.0%, GPQA: 93.5%, CharXiv-R: 91.3%, BrowseComp: 91.2%. Seed 2.0 Pro scores AIME 2025: 98.3%, AIME 2026: 94.2%, GPQA: 88.9%, LiveCodeBench v6: 87.8%, BrowseComp: 77.3%.

Is Kimi K3 cheaper than Seed 2.0 Pro?

Seed 2.0 Pro is 6.0x cheaper for input tokens. Kimi K3 costs $3.00/M input and $15.00/M output via moonshot. Seed 2.0 Pro costs $0.50/M input and $3.00/M output via deepinfra.

What are the context window sizes for Kimi K3 and Seed 2.0 Pro?

Kimi K3 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 Kimi K3 and Seed 2.0 Pro?

Key differences include context window (1.0M vs 256K), input pricing ($3.00 vs $0.50/M), licensing (Unknown vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Kimi K3 and Seed 2.0 Pro?

Kimi K3 is developed by Moonshot AI and Seed 2.0 Pro is developed by ByteDance.

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