The AI arena is free today

Open Superagent

GLM-5.3 vs Seed 2.0 Pro

Comparing GLM-5.3 and Seed 2.0 Pro across benchmarks, pricing, and capabilities.

Zhipu AI · ByteDance · Updated for 2026

Which is better?

GLM-5.3 and Seed 2.0 Pro trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.

On price, Seed 2.0 Pro is roughly 1.9x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

GLM-5.3 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 benchmark, pricing, and model metadata for 2026.

Choose GLM-5.3

  • you process long inputs — it offers a 1,000,000 token context window
  • you want the most recent training data — it shipped Aug 2026

Choose Seed 2.0 Pro

  • cost matters — it's about 1.9x cheaper per token

At a glance

The differences that matter most.

GLM-5.3
Zhipu AI
Seed 2.0 Pro
ByteDance
Benchmark wins
—
—
Input price
$1.40 / M
$0.50 / M
Output price
$4.40 / M
$3.00 / M
Context window
1,000,000
256,000
Released
Aug 2026
Feb 2026
License
Unknown
Proprietary

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

GLM-5.3 and Seed 2.0 Prodon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Playground indexes and blind preference scores

Pricing Analysis

Price comparison per million tokens

Seed 2.0 Pro costs less

For input processing, GLM-5.3 ($1.40/1M tokens) is 2.8x more expensive than Seed 2.0 Pro ($0.50/1M tokens).

For output processing, GLM-5.3 ($4.40/1M tokens) is 1.5x more expensive than Seed 2.0 Pro ($3.00/1M tokens).

In conclusion, GLM-5.3 is more expensive than Seed 2.0 Pro.*

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

Lowest available price from all providers
Tue Aug 25 2026 • llm-stats.com
Zhipu AI
GLM-5.3
Input tokens$1.40
Output tokens$4.40
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

GLM-5.3 accepts 1,000,000 input tokens compared to Seed 2.0 Pro's 256,000 tokens. GLM-5.3 can generate longer responses up to 128,000 tokens, while Seed 2.0 Pro is limited to 65,536 tokens.

Zhipu AI
GLM-5.3
Input1,000,000 tokens
Output128,000 tokens
ByteDance
Seed 2.0 Pro
Input256,000 tokens
Output65,536 tokens
Tue Aug 25 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Seed 2.0 Pro supports multimodal inputs, whereas GLM-5.3 does not.

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

GLM-5.3

Text
Images
Audio
Video

Seed 2.0 Pro

Text
Images
Audio
Video

Release Timeline

When each model was launched

GLM-5.3 was released on 2026-08-14, while Seed 2.0 Pro was released on 2026-02-14.

GLM-5.3 is 6 months newer than Seed 2.0 Pro.

GLM-5.3

Aug 14, 2026

1 weeks ago

6mo newer
Seed 2.0 Pro

Feb 14, 2026

6 months ago

Knowledge Cutoff

When training data ends

Seed 2.0 Pro has a documented knowledge cutoff of 2024-01-01, while GLM-5.3'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 GLM-5.3's cutoff date.

GLM-5.3

—

Seed 2.0 Pro

Jan 2024

Provider Availability

GLM-5.3 is available from ZAI. Seed 2.0 Pro is available from DeepInfra.

GLM-5.3

z logo
Unknown Organization
Input Price:Input: $1.40/1MOutput Price:Output: $4.40/1M

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→

Judge for yourself.

Run your own prompts against GLM-5.3 and Seed 2.0 Pro side-by-side, then vote on the output you prefer.

GLM-5.3
✓ Preferred
Seed 2.0 Pro
Open in Playground

FAQ

Common questions about GLM-5.3 vs Seed 2.0 Pro.

Which is better, GLM-5.3 or Seed 2.0 Pro?

GLM-5.3 (Zhipu AI) and Seed 2.0 Pro (ByteDance) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does GLM-5.3 compare to Seed 2.0 Pro in benchmarks?

GLM-5.3 scores Terminal-Bench 2.1: 88.2%, CyberGym: 84.5%, FrontierSWE: 78.1%, Toolathlon: 73.0%, DeepSWE 1.1: 66.9%. Seed 2.0 Pro scores AIME 2025: 98.3%, AIME 2026: 94.2%, GPQA: 88.9%, LiveCodeBench v6: 87.8%, BrowseComp: 77.3%.

Is GLM-5.3 cheaper than Seed 2.0 Pro?

Seed 2.0 Pro is 2.8x cheaper for input tokens. GLM-5.3 costs $1.40/M input and $4.40/M output via z. Seed 2.0 Pro costs $0.50/M input and $3.00/M output via deepinfra.

What are the context window sizes for GLM-5.3 and Seed 2.0 Pro?

GLM-5.3 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 GLM-5.3 and Seed 2.0 Pro?

Key differences include context window (1.0M vs 256K), input pricing ($1.40 vs $0.50/M), multimodal support (no vs yes), licensing (Unknown vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes GLM-5.3 and Seed 2.0 Pro?

GLM-5.3 is developed by Zhipu AI and Seed 2.0 Pro is developed by ByteDance.

Related comparisons