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Gemini 3.6 Flash vs Grok 4.5

Gemini 3.6 Flash and Grok 4.5 are closely matched at 43.5 and 45.5 on the LLM Stats Score. Gemini 3.6 Flash and Grok 4.5 cost the same.

Google · xAI · Updated for 2026

Which is better?

Gemini 3.6 Flash and Grok 4.5 are closely matched on the overall LLM Stats Score at 43.5 and 45.5.

In the 3 individual benchmarks reported for both models, Grok 4.5 wins 3; this is a narrower head-to-head signal than the composite indexes.

Gemini 3.6 Flash also accepts a larger context window (1,048,576 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 Gemini 3.6 Flash

  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Jul 2026

Choose Grok 4.5

  • you value its reported benchmark strengths — it wins 3 of 3 exact shared results

At a glance

The differences that matter most.

Gemini 3.6 Flash
Google
Grok 4.5
xAI
Core performance indexes
LLM Stats Score
43.5
#36
45.5
#27
Reasoning
40.2
#51
43.8
#35
Coding
28.9
#52
35.3
#27
Agents
27.5
#38
30.6
#30
Cost, coverage & limits
Benchmark wins
0 of 3
3 of 3
Input price
$1.50 / M
$2.00 / M
Output price
$7.50 / M
$6.00 / M
Context window
1,048,576
500,000

Individual benchmarks

7 reported for Gemini 3.6 Flash · 15 for Grok 4.5

3 shared

Gemini 3.6 Flash outperforms in 0 benchmarks, while Grok 4.5 is better at 3 benchmarks (DeepSWE 1.1, SWE-Bench Pro, Terminal-Bench 2.1).

Grok 4.5 significantly outperforms across most benchmarks.

Sun Sep 06 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

For input processing, Gemini 3.6 Flash ($1.50/1M tokens) is 1.3x cheaper than Grok 4.5 ($2.00/1M tokens).

For output processing, Gemini 3.6 Flash ($7.50/1M tokens) is 1.3x more expensive than Grok 4.5 ($6.00/1M tokens).

In conclusion, Gemini 3.6 Flash and Grok 4.5 cost the same.*

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

Lowest available price from all providers
Sun Sep 06 2026 • llm-stats.com
Google
Gemini 3.6 Flash
Input tokens$1.50
Output tokens$7.50
Best providerGoogle
xAI
Grok 4.5
Input tokens$2.00
Output tokens$6.00
Best providerxAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Gemini 3.6 Flash accepts 1,048,576 input tokens compared to Grok 4.5's 500,000 tokens. Only Gemini 3.6 Flash specifies output context (65,536 tokens).

Google
Gemini 3.6 Flash
Input1,048,576 tokens
Output65,536 tokens
xAI
Grok 4.5
Input500,000 tokens
Output- tokens
Sun Sep 06 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Gemini 3.6 Flash and Grok 4.5 support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Gemini 3.6 Flash

Text
Images
Audio
Video

Grok 4.5

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.

Gemini 3.6 Flash

Proprietary

Closed source

Grok 4.5

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.6 Flash was released on 2026-07-21, while Grok 4.5 was released on 2026-07-16.

Gemini 3.6 Flash is 0 month newer than Grok 4.5.

Gemini 3.6 Flash

Jul 21, 2026

1 months ago

5d newer
Grok 4.5

Jul 16, 2026

1 months ago

Knowledge Cutoff

When training data ends

Gemini 3.6 Flash has a knowledge cutoff of 2026-03-31, while Grok 4.5 has a cutoff of 2026-02-01.

Gemini 3.6 Flash has more recent training data (up to 2026-03-31), making it potentially better informed about events through that date compared to Grok 4.5 (2026-02-01).

Gemini 3.6 Flash

Mar 2026

1 mo newer
Grok 4.5

Feb 2026

Provider Availability

Gemini 3.6 Flash is available from Google. Grok 4.5 is available from xAI.

Gemini 3.6 Flash

google logo
Google
Input Price:Input: $1.50/1MOutput Price:Output: $7.50/1M

Grok 4.5

xai logo
xAI
Input Price:Input: $2.00/1MOutput Price:Output: $6.00/1M
* 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 Gemini 3.6 Flash and Grok 4.5 side-by-side, then vote on the output you prefer.

Gemini 3.6 Flash
✓ Preferred
Grok 4.5
Open in Playground

FAQ

Common questions about Gemini 3.6 Flash vs Grok 4.5.

Which is better, Gemini 3.6 Flash or Grok 4.5?

Gemini 3.6 Flash and Grok 4.5 are closely matched on the LLM Stats Score at 43.5 and 45.5. Gemini 3.6 Flash is made by Google and Grok 4.5 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 3.6 Flash compare to Grok 4.5 in benchmarks?

Gemini 3.6 Flash scores CharXiv-R: 89.4%, OSWorld-Verified: 83.0%, Terminal-Bench 2.1: 78.0%, MLE-Bench: 63.9%, SWE-Bench Pro: 58.7%. Grok 4.5 scores GPQA: 93.0%, Terminal-Bench 2.1: 83.3%, SWE-Bench Pro: 64.7%, AA-Omniscience Index: 63.0%, DeepSWE 1.0: 62.0%.

Is Gemini 3.6 Flash cheaper than Grok 4.5?

Gemini 3.6 Flash is 1.3x cheaper for input tokens. Gemini 3.6 Flash costs $1.50/M input and $7.50/M output via google. Grok 4.5 costs $2.00/M input and $6.00/M output via xai.

What are the context window sizes for Gemini 3.6 Flash and Grok 4.5?

Gemini 3.6 Flash supports 1.0M tokens and Grok 4.5 supports 500K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Gemini 3.6 Flash and Grok 4.5?

Key differences include LLM Stats Score (43.5 vs 45.5), context window (1.0M vs 500K), input pricing ($1.50 vs $2.00/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3.6 Flash and Grok 4.5?

Gemini 3.6 Flash is developed by Google and Grok 4.5 is developed by xAI.

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