Model Comparison

DeepSeek-V2.5 vs Grok-1.5Which is better in 2026?

DeepSeek-V2.5 shows notably better performance in the majority of benchmarks.

Verdict: DeepSeek-V2.5 vs Grok-1.5 — which is better?

DeepSeek-V2.5 (by DeepSeek) and Grok-1.5 (by xAI) 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.

DeepSeek-V2.5 outperforms in 3 benchmarks (GSM8k, HumanEval, MATH), while Grok-1.5 is better at 1 benchmark (MMLU). DeepSeek-V2.5 shows notably better performance in the majority of benchmarks.

Choose DeepSeek-V2.5 if…

  • you want the strongest raw capability — it leads on 3 of 4 shared benchmarks
  • you want the most recent training data — it shipped May 2024
  • you need open weights you can self-host or fine-tune

Choose Grok-1.5 if…

  • you are already invested in the xAI ecosystem
Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

4 benchmarks

DeepSeek-V2.5 outperforms in 3 benchmarks (GSM8k, HumanEval, MATH), while Grok-1.5 is better at 1 benchmark (MMLU).

DeepSeek-V2.5 shows notably better performance in the majority of benchmarks.

Sat Jun 06 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only DeepSeek-V2.5 specifies input context (8,192 tokens). Only DeepSeek-V2.5 specifies output context (8,192 tokens).

DeepSeek
DeepSeek-V2.5
Input8,192 tokens
Output8,192 tokens
xAI
Grok-1.5
Input- tokens
Output- tokens
Sat Jun 06 2026 • llm-stats.com

License

Usage and distribution terms

DeepSeek-V2.5 is licensed under deepseek, while Grok-1.5 uses a proprietary license.

License differences may affect how you can use these models in commercial or open-source projects.

DeepSeek-V2.5

deepseek

Open weights

Grok-1.5

Proprietary

Closed source

Release Timeline

When each model was launched

DeepSeek-V2.5 was released on 2024-05-08, while Grok-1.5 was released on 2024-03-28.

DeepSeek-V2.5 is 1 month newer than Grok-1.5.

DeepSeek-V2.5

May 8, 2024

2.1 years ago

1mo newer
Grok-1.5

Mar 28, 2024

2.2 years ago

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

DeepSeek
Larger context window (8,192 tokens)
Has open weights
Higher GSM8k score (95.1% vs 90.0%)
Higher HumanEval score (89.0% vs 74.1%)
Higher MATH score (74.7% vs 50.6%)
xAI
Higher MMLU score (81.3% vs 80.4%)

Detailed Comparison

AI Model Comparison Table
Feature
DeepSeek
DeepSeek-V2.5
xAI
Grok-1.5

FAQ

Common questions about DeepSeek-V2.5 vs Grok-1.5.

Which is better, DeepSeek-V2.5 or Grok-1.5?

DeepSeek-V2.5 shows notably better performance in the majority of benchmarks. DeepSeek-V2.5 is made by DeepSeek and Grok-1.5 is made by xAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does DeepSeek-V2.5 compare to Grok-1.5 in benchmarks?

DeepSeek-V2.5 scores GSM8k: 95.1%, MT-Bench: 90.2%, HumanEval: 89.0%, BBH: 84.3%, AlignBench: 80.4%. Grok-1.5 scores GSM8k: 90.0%, DocVQA: 85.6%, MMLU: 81.3%, HumanEval: 74.1%, MMMU: 53.6%.

What are the context window sizes for DeepSeek-V2.5 and Grok-1.5?

DeepSeek-V2.5 supports 8K tokens and Grok-1.5 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 DeepSeek-V2.5 and Grok-1.5?

Key differences include licensing (deepseek vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes DeepSeek-V2.5 and Grok-1.5?

DeepSeek-V2.5 is developed by DeepSeek and Grok-1.5 is developed by xAI.

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