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Gemini 1.5 Flash vs Grok 4.6

Comparing Gemini 1.5 Flash and Grok 4.6 across benchmarks, pricing, and capabilities.

Google · xAI · Updated for 2026

Which is better?

Gemini 1.5 Flash and Grok 4.6 trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.

On price, Gemini 1.5 Flash is roughly 11.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Gemini 1.5 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 benchmark, pricing, and model metadata for 2026.

Choose Gemini 1.5 Flash

  • cost matters — it's about 11.4x cheaper per token
  • you process long inputs — it offers a 1,048,576 token context window

Choose Grok 4.6

  • you want the most recent training data — it shipped Aug 2026

At a glance

The differences that matter most.

Gemini 1.5 Flash
Google
Grok 4.6
xAI
Benchmark wins
—
—
Input price
$0.15 / M
$2.00 / M
Output price
$0.60 / M
$6.00 / M
Context window
1,048,576
500,000
Released
May 2024
Aug 2026
License
Proprietary
Proprietary

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Gemini 1.5 Flash and Grok 4.6don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Playground indexes and blind preference scores

Pricing Analysis

Price comparison per million tokens

Gemini 1.5 Flash costs less

For input processing, Gemini 1.5 Flash ($0.15/1M tokens) is 13.3x cheaper than Grok 4.6 ($2.00/1M tokens).

For output processing, Gemini 1.5 Flash ($0.60/1M tokens) is 10.0x cheaper than Grok 4.6 ($6.00/1M tokens).

In conclusion, Grok 4.6 is more expensive than Gemini 1.5 Flash.*

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

Lowest available price from all providers
Mon Aug 24 2026 • llm-stats.com
Google
Gemini 1.5 Flash
Input tokens$0.15
Output tokens$0.60
Best providerGoogle
xAI
Grok 4.6
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 1.5 Flash accepts 1,048,576 input tokens compared to Grok 4.6's 500,000 tokens. Only Gemini 1.5 Flash specifies output context (8,192 tokens).

Google
Gemini 1.5 Flash
Input1,048,576 tokens
Output8,192 tokens
xAI
Grok 4.6
Input500,000 tokens
Output- tokens
Mon Aug 24 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 1.5 Flash and Grok 4.6 support multimodal inputs.

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

Gemini 1.5 Flash

Text
Images
Audio
Video

Grok 4.6

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 1.5 Flash

Proprietary

Closed source

Grok 4.6

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 1.5 Flash was released on 2024-05-01, while Grok 4.6 was released on 2026-08-12.

Grok 4.6 is 28 months newer than Gemini 1.5 Flash.

Gemini 1.5 Flash

May 1, 2024

2.3 years ago

Grok 4.6

Aug 12, 2026

1 weeks ago

2.3yr newer

Knowledge Cutoff

When training data ends

Gemini 1.5 Flash has a knowledge cutoff of 2023-11-01, while Grok 4.6 has a cutoff of 2026-02-01.

Grok 4.6 has more recent training data (up to 2026-02-01), making it potentially better informed about events through that date compared to Gemini 1.5 Flash (2023-11-01).

Gemini 1.5 Flash

Nov 2023

Grok 4.6

Feb 2026

2.3 yr newer

Provider Availability

Gemini 1.5 Flash is available from Google. Grok 4.6 is available from xAI.

Gemini 1.5 Flash

google logo
Google
Input Price:Input: $0.15/1MOutput Price:Output: $0.60/1M

Grok 4.6

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 1.5 Flash and Grok 4.6 side-by-side, then vote on the output you prefer.

Gemini 1.5 Flash
✓ Preferred
Grok 4.6
Open in Playground

FAQ

Common questions about Gemini 1.5 Flash vs Grok 4.6.

Which is better, Gemini 1.5 Flash or Grok 4.6?

Gemini 1.5 Flash (Google) and Grok 4.6 (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 Gemini 1.5 Flash compare to Grok 4.6 in benchmarks?

Gemini 1.5 Flash scores XSTest: 97.0%, FLEURS: 90.4%, HellaSwag: 86.5%, GSM8k: 86.2%, BIG-Bench Hard: 85.5%. Grok 4.6 scores CursorBench v3.2: 69.9%, DeepSWE 1.1: 65.9%, FrontierCode: 61.3%, AA-Index: 61.0%, GDPval-AA: 58.4%.

Is Gemini 1.5 Flash cheaper than Grok 4.6?

Gemini 1.5 Flash is 13.3x cheaper for input tokens. Gemini 1.5 Flash costs $0.15/M input and $0.60/M output via google. Grok 4.6 costs $2.00/M input and $6.00/M output via xai.

What are the context window sizes for Gemini 1.5 Flash and Grok 4.6?

Gemini 1.5 Flash supports 1.0M tokens and Grok 4.6 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 1.5 Flash and Grok 4.6?

Key differences include context window (1.0M vs 500K), input pricing ($0.15 vs $2.00/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 1.5 Flash and Grok 4.6?

Gemini 1.5 Flash is developed by Google and Grok 4.6 is developed by xAI.

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