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Gemini 1.0 Pro vs Grok-1.5

Gemini 1.0 Pro and Grok-1.5 are closely matched at -5.2 and -2.4 on the LLM Stats Score.

Google · xAI · Updated for 2026

Which is better?

Gemini 1.0 Pro and Grok-1.5 are closely matched on the overall LLM Stats Score at -5.2 and -2.4.

In the 5 individual benchmarks reported for both models, Grok-1.5 wins 5; this is a narrower head-to-head signal than the composite indexes.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Gemini 1.0 Pro

  • you want predictable pricing at $0.50/M input and $1.50/M output

Choose Grok-1.5

  • you value its reported benchmark strengths — it wins 5 of 5 exact shared results
  • you want the most recent training data — it shipped Mar 2024

At a glance

The differences that matter most.

Gemini 1.0 Pro
Google
Grok-1.5
xAI
Core performance indexes
LLM Stats Score
-5.2
#340
-2.4
#323
Reasoning
-7.8
#339
-1.9
#314
Cost, coverage & limits
Benchmark wins
0 of 5
5 of 5
Input price
$0.50 / M
— / M
Output price
$1.50 / M
— / M
Context window
32,760
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

3 shared
Index
Gemini 1.0 Pro
Grok-1.5
Math
-1.4#294
5.4#264
Vision
-8.3#196
-4.7#193
Multimodal
-5.9#157
-2.2#152
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

9 reported for Gemini 1.0 Pro · 9 for Grok-1.5

5 shared

Gemini 1.0 Pro outperforms in 0 benchmarks, while Grok-1.5 is better at 5 benchmarks (GPQA, MATH, MathVista, MMLU, MMMU).

Grok-1.5 significantly outperforms across most benchmarks.

Mon Aug 31 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Gemini 1.0 Pro specifies input context (32,760 tokens). Only Gemini 1.0 Pro specifies output context (8,192 tokens).

Google
Gemini 1.0 Pro
Input32,760 tokens
Output8,192 tokens
xAI
Grok-1.5
Input- tokens
Output- tokens
Mon Aug 31 2026 • llm-stats.com

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Gemini 1.0 Pro

Proprietary

Closed source

Grok-1.5

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 1.0 Pro was released on 2024-02-15, while Grok-1.5 was released on 2024-03-28.

Grok-1.5 is 1 month newer than Gemini 1.0 Pro.

Gemini 1.0 Pro

Feb 15, 2024

2.5 years ago

Grok-1.5

Mar 28, 2024

2.4 years ago

1mo newer

Knowledge Cutoff

When training data ends

Gemini 1.0 Pro has a documented knowledge cutoff of 2024-02-01, while Grok-1.5's cutoff date is not specified.

We can confirm Gemini 1.0 Pro's training data extends to 2024-02-01, but cannot make a direct comparison without Grok-1.5's cutoff date.

Gemini 1.0 Pro

Feb 2024

Grok-1.5

—

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Gemini 1.0 Pro and Grok-1.5 side-by-side, then vote on the output you prefer.

Gemini 1.0 Pro
✓ Preferred
Grok-1.5
Open in Playground

FAQ

Common questions about Gemini 1.0 Pro vs Grok-1.5.

Which is better, Gemini 1.0 Pro or Grok-1.5?

Gemini 1.0 Pro and Grok-1.5 are closely matched on the LLM Stats Score at -5.2 and -2.4. Gemini 1.0 Pro is made by Google and Grok-1.5 is made by xAI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Gemini 1.0 Pro compare to Grok-1.5 in benchmarks?

Gemini 1.0 Pro scores FLEURS: 93.6%, BIG-Bench: 75.0%, MMLU: 71.8%, WMT23: 71.7%, EgoSchema: 55.7%. 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 Gemini 1.0 Pro and Grok-1.5?

Gemini 1.0 Pro supports 33K 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 Gemini 1.0 Pro and Grok-1.5?

Key differences include LLM Stats Score (-5.2 vs -2.4). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 1.0 Pro and Grok-1.5?

Gemini 1.0 Pro is developed by Google and Grok-1.5 is developed by xAI.

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