The AI arena is free today

Open Superagent

DeepSeek-V4-Flash-Vision-Exp vs Grok-4 Heavy

Comparing DeepSeek-V4-Flash-Vision-Exp and Grok-4 Heavy across benchmarks, pricing, and capabilities.

DeepSeek · xAI · Updated for 2026

Which is better?

DeepSeek-V4-Flash-Vision-Exp and Grok-4 Heavy trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.

Based on current benchmark, pricing, and model metadata for 2026.

Choose DeepSeek-V4-Flash-Vision-Exp

  • you want predictable pricing at $0.22/M input and $0.66/M output

Choose Grok-4 Heavy

  • you are already invested in the xAI ecosystem

At a glance

The differences that matter most.

DeepSeek-V4-Flash-Vision-Exp
DeepSeek
Grok-4 Heavy
xAI
Benchmark wins
—
—
Input price
$0.22 / M
— / M
Output price
$0.66 / M
— / M
Context window
1,048,576
—
Released
Aug 2026
—
License
Unknown
Proprietary

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

DeepSeek-V4-Flash-Vision-Exp and Grok-4 Heavydon'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

Context Window

Maximum input and output token capacity

Only DeepSeek-V4-Flash-Vision-Exp specifies input context (1,048,576 tokens). Only DeepSeek-V4-Flash-Vision-Exp specifies output context (393,216 tokens).

DeepSeek
DeepSeek-V4-Flash-Vision-Exp
Input1,048,576 tokens
Output393,216 tokens
xAI
Grok-4 Heavy
Input- tokens
Output- tokens
Tue Aug 25 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both DeepSeek-V4-Flash-Vision-Exp and Grok-4 Heavy support multimodal inputs.

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

DeepSeek-V4-Flash-Vision-Exp

Text
Images
Audio
Video

Grok-4 Heavy

Text
Images
Audio
Video

Release Timeline

When each model was launched

DeepSeek-V4-Flash-Vision-Exp was released on 2026-08-21, while Grok-4 Heavy's release date is not specified.

We can confirm DeepSeek-V4-Flash-Vision-Exp's release timeline, but cannot make a direct age comparison without Grok-4 Heavy's release date.

DeepSeek-V4-Flash-Vision-Exp

Aug 21, 2026

4 days ago

Grok-4 Heavy

—

Knowledge Cutoff

When training data ends

Grok-4 Heavy has a documented knowledge cutoff of 2024-12-31, while DeepSeek-V4-Flash-Vision-Exp's cutoff date is not specified.

We can confirm Grok-4 Heavy's training data extends to 2024-12-31, but cannot make a direct comparison without DeepSeek-V4-Flash-Vision-Exp's cutoff date.

DeepSeek-V4-Flash-Vision-Exp

—

Grok-4 Heavy

Dec 2024

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against DeepSeek-V4-Flash-Vision-Exp and Grok-4 Heavy side-by-side, then vote on the output you prefer.

DeepSeek-V4-Flash-Vision-Exp
✓ Preferred
Grok-4 Heavy
Open in Playground

FAQ

Common questions about DeepSeek-V4-Flash-Vision-Exp vs Grok-4 Heavy.

Which is better, DeepSeek-V4-Flash-Vision-Exp or Grok-4 Heavy?

DeepSeek-V4-Flash-Vision-Exp (DeepSeek) and Grok-4 Heavy (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-V4-Flash-Vision-Exp compare to Grok-4 Heavy in benchmarks?

DeepSeek-V4-Flash-Vision-Exp scores Terminal-Bench 2.1: 83.9%, DSBench-Hard: 63.6%, DeepSWE: 59.3%, NL2Repo: 57.7%, ZEROBench: 35.0%. Grok-4 Heavy scores AIME 2025: 100.0%, HMMT25: 96.7%, GPQA: 88.4%, LiveCodeBench: 79.4%, USAMO25: 61.9%.

What are the context window sizes for DeepSeek-V4-Flash-Vision-Exp and Grok-4 Heavy?

DeepSeek-V4-Flash-Vision-Exp supports 1.0M tokens and Grok-4 Heavy 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-V4-Flash-Vision-Exp and Grok-4 Heavy?

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

Who makes DeepSeek-V4-Flash-Vision-Exp and Grok-4 Heavy?

DeepSeek-V4-Flash-Vision-Exp is developed by DeepSeek and Grok-4 Heavy is developed by xAI.

Related comparisons