The AI arena is free today

Open Superagent

Seed 2.0 Pro vs Solar Pro 4

Seed 2.0 Pro and Solar Pro 4 are closely matched at 39.5 and 35.2 on the LLM Stats Score. Solar Pro 4 is 2.1x cheaper per token.

ByteDance · Upstage · Updated for 2026

Which is better?

Seed 2.0 Pro and Solar Pro 4 are closely matched on the overall LLM Stats Score at 39.5 and 35.2.

The models split the 4 individual benchmarks reported for both models evenly.

On price, Solar Pro 4 is roughly 2.1x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Solar Pro 4 also accepts a larger context window (524,288 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 Seed 2.0 Pro

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

Choose Solar Pro 4

  • cost matters — it's about 2.1x cheaper per token
  • you process long inputs — it offers a 524,288 token context window
  • you want the most recent training data — it shipped Aug 2026

At a glance

The differences that matter most.

Seed 2.0 Pro
ByteDance
Solar Pro 4
Upstage
Core performance indexes
LLM Stats Score
39.5
#57
35.2
#87
Reasoning
39.0
#57
34.8
#83
Coding
22.0
#83
21.1
#90
Agents
16.8
#77
11.8
#107
Cost, coverage & limits
Benchmark wins
2 of 4
2 of 4
Input price
$0.50 / M
$0.30 / M
Output price
$3.00 / M
$1.20 / M
Context window
256,000
524,288

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Seed 2.0 Pro
Solar Pro 4
Math
32.2#62
32.3#60
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

6 reported for Seed 2.0 Pro · 9 for Solar Pro 4

4 shared

Seed 2.0 Pro outperforms in 2 benchmarks (BrowseComp, SWE-Bench Verified), while Solar Pro 4 is better at 2 benchmarks (AIME 2026, GPQA).

Both models are evenly matched across the benchmarks.

Mon Sep 21 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Solar Pro 4 costs less

For input processing, Seed 2.0 Pro ($0.50/1M tokens) is 1.7x more expensive than Solar Pro 4 ($0.30/1M tokens).

For output processing, Seed 2.0 Pro ($3.00/1M tokens) is 2.5x more expensive than Solar Pro 4 ($1.20/1M tokens).

In conclusion, Seed 2.0 Pro is more expensive than Solar Pro 4.*

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

Lowest available price from all providers
Mon Sep 21 2026 • llm-stats.com
ByteDance
Seed 2.0 Pro
Input tokens$0.50
Output tokens$3.00
Best providerDeepinfra
Upstage
Solar Pro 4
Input tokens$0.30
Output tokens$1.20
Best providerUnknown Organization
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Solar Pro 4 accepts 524,288 input tokens compared to Seed 2.0 Pro's 256,000 tokens. Both models can generate responses up to 131,072 tokens.

ByteDance
Seed 2.0 Pro
Input256,000 tokens
Output131,072 tokens
Upstage
Solar Pro 4
Input524,288 tokens
Output131,072 tokens
Mon Sep 21 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Seed 2.0 Pro supports multimodal inputs, whereas Solar Pro 4 does not.

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

Seed 2.0 Pro

Text
Images
Audio
Video

Solar Pro 4

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.

Seed 2.0 Pro

Proprietary

Closed source

Solar Pro 4

Proprietary

Closed source

Release Timeline

When each model was launched

Seed 2.0 Pro was released on 2026-02-14, while Solar Pro 4 was released on 2026-08-06.

Solar Pro 4 is 6 months newer than Seed 2.0 Pro.

Seed 2.0 Pro

Feb 14, 2026

7 months ago

Solar Pro 4

Aug 6, 2026

1 months ago

5mo newer

Knowledge Cutoff

When training data ends

Seed 2.0 Pro has a documented knowledge cutoff of 2024-01-01, while Solar Pro 4'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 Solar Pro 4's cutoff date.

Seed 2.0 Pro

Jan 2024

Solar Pro 4

—

Provider Availability

Seed 2.0 Pro is available from DeepInfra. Solar Pro 4 is available from Upstage.

Seed 2.0 Pro

deepinfra logo
Deepinfra
Input Price:Input: $0.50/1MOutput Price:Output: $3.00/1M

Solar Pro 4

upstage logo
Unknown Organization
Input Price:Input: $0.30/1MOutput Price:Output: $1.20/1M
* 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 Seed 2.0 Pro and Solar Pro 4 side-by-side, then vote on the output you prefer.

Seed 2.0 Pro
✓ Preferred
Solar Pro 4
Open in Playground

FAQ

Common questions about Seed 2.0 Pro vs Solar Pro 4.

Which is better, Seed 2.0 Pro or Solar Pro 4?

Seed 2.0 Pro and Solar Pro 4 are closely matched on the LLM Stats Score at 39.5 and 35.2. Seed 2.0 Pro is made by ByteDance and Solar Pro 4 is made by Upstage. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Seed 2.0 Pro compare to Solar Pro 4 in benchmarks?

Seed 2.0 Pro scores AIME 2025: 98.3%, AIME 2026: 94.2%, GPQA: 88.9%, LiveCodeBench v6: 87.8%, BrowseComp: 77.3%. Solar Pro 4 scores AIME 2026: 95.3%, GPQA: 89.0%, LiveCodeBench: 87.8%, MMLU-Pro: 86.3%, AA-LCR: 71.0%.

Is Seed 2.0 Pro cheaper than Solar Pro 4?

Solar Pro 4 is 1.7x cheaper for input tokens. Seed 2.0 Pro costs $0.50/M input and $3.00/M output via deepinfra. Solar Pro 4 costs $0.30/M input and $1.20/M output via upstage.

What are the context window sizes for Seed 2.0 Pro and Solar Pro 4?

Seed 2.0 Pro supports 256K tokens and Solar Pro 4 supports 524K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Seed 2.0 Pro and Solar Pro 4?

Key differences include LLM Stats Score (39.5 vs 35.2), context window (256K vs 524K), input pricing ($0.50 vs $0.30/M), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

Who makes Seed 2.0 Pro and Solar Pro 4?

Seed 2.0 Pro is developed by ByteDance and Solar Pro 4 is developed by Upstage.

Related comparisons