Model Comparison

DeepSeek-R1 vs Grok-1.5Which is better in 2026?

Comparing DeepSeek-R1 and Grok-1.5 across benchmarks, pricing, and capabilities.

Verdict: DeepSeek-R1 vs Grok-1.5 — which is better?

DeepSeek-R1 (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.

Choose DeepSeek-R1 if…

  • you want the most recent training data — it shipped Jan 2025
  • you need open weights you can self-host or fine-tune

Choose Grok-1.5 if…

  • you are already invested in the xAI ecosystem
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Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

DeepSeek-R1 and Grok-1.5don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only DeepSeek-R1 specifies input context (131,072 tokens). Only DeepSeek-R1 specifies output context (131,072 tokens).

DeepSeek
DeepSeek-R1
Input131,072 tokens
Output131,072 tokens
xAI
Grok-1.5
Input- tokens
Output- tokens
Sat Jun 13 2026 • llm-stats.com

License

Usage and distribution terms

DeepSeek-R1 is licensed under MIT, 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-R1

MIT

Open weights

Grok-1.5

Proprietary

Closed source

Release Timeline

When each model was launched

DeepSeek-R1 was released on 2025-01-20, while Grok-1.5 was released on 2024-03-28.

DeepSeek-R1 is 10 months newer than Grok-1.5.

DeepSeek-R1

Jan 20, 2025

1.4 years ago

9mo 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 (131,072 tokens)
Has open weights
xAI

No standout differentiators in the data we have for this pair.

Detailed Comparison

AI Model Comparison Table
Feature
DeepSeek
DeepSeek-R1
xAI
Grok-1.5

FAQ

Common questions about DeepSeek-R1 vs Grok-1.5.

Which is better, DeepSeek-R1 or Grok-1.5?

DeepSeek-R1 (DeepSeek) and Grok-1.5 (xAI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does DeepSeek-R1 compare to Grok-1.5 in benchmarks?

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-R1 and Grok-1.5?

DeepSeek-R1 supports 131K 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-R1 and Grok-1.5?

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

Who makes DeepSeek-R1 and Grok-1.5?

DeepSeek-R1 is developed by DeepSeek and Grok-1.5 is developed by xAI.

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