Gemini 3.8 Flash vs Grok 4.7
Gemini 3.8 Flash and Grok 4.7 are closely matched at 50.4 and 48.5 on the LLM Stats Score. Gemini 3.8 Flash is 2.0x cheaper per token.
Google · xAI · Updated for 2026
Which is better?
Gemini 3.8 Flash and Grok 4.7 are closely matched on the overall LLM Stats Score at 50.4 and 48.5.
In the 3 individual benchmarks reported for both models, Grok 4.7 wins 2; this is a narrower head-to-head signal than the composite indexes.
On price, Gemini 3.8 Flash is roughly 2.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Gemini 3.8 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 3.8 Flash
- cost matters — it's about 2.0x cheaper per token
- you process long inputs — it offers a 1,048,576 token context window
Choose Grok 4.7
- you value its reported benchmark strengths — it wins 2 of 3 exact shared results
- you want the most recent training data — it shipped Sep 2026
At a glance
The differences that matter most.
Individual benchmarks
13 reported for Gemini 3.8 Flash · 23 for Grok 4.7
Gemini 3.8 Flash outperforms in 1 benchmarks (DeepSWE 1.1), while Grok 4.7 is better at 2 benchmarks (Harvey's Legal Agent Benchmark, Terminal-Bench 4.0).
Grok 4.7 shows notably better performance in the majority of benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Gemini 3.8 Flash ($0.75/1M tokens) is 2.7x cheaper than Grok 4.7 ($2.00/1M tokens).
For output processing, Gemini 3.8 Flash ($3.75/1M tokens) is 1.6x cheaper than Grok 4.7 ($6.00/1M tokens).
In conclusion, Grok 4.7 is more expensive than Gemini 3.8 Flash.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Gemini 3.8 Flash accepts 1,048,576 input tokens compared to Grok 4.7's 500,000 tokens. Only Gemini 3.8 Flash specifies output context (65,536 tokens).
Input capabilities
Documented input modalities across available providers
Both Gemini 3.8 Flash and Grok 4.7 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Gemini 3.8 Flash
Grok 4.7
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
Gemini 3.8 Flash was released on 2026-09-02, while Grok 4.7 was released on 2026-09-21.
Grok 4.7 is 1 month newer than Gemini 3.8 Flash.
Sep 2, 2026
2 weeks ago
Sep 21, 2026
0 days ago
2w newerKnowledge Cutoff
When training data ends
Gemini 3.8 Flash has a knowledge cutoff of 2026-03-31, while Grok 4.7 has a cutoff of 2026-05-01.
Grok 4.7 has more recent training data (up to 2026-05-01), making it potentially better informed about events through that date compared to Gemini 3.8 Flash (2026-03-31).
Mar 2026
May 2026
2 mo newerProvider Availability
Gemini 3.8 Flash is available from Google. Grok 4.7 is available from xAI.
Gemini 3.8 Flash
Grok 4.7
Outputs Comparison
Judge for yourself.
Run your own prompts against Gemini 3.8 Flash and Grok 4.7 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Gemini 3.8 Flash vs Grok 4.7.