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Grok 4 Fast vs DeepSeek V4 Pro (0813)

At a glance

Fast version of Grok 4 with SOTA cost-efficiency and 2M-token context.

772M ctx#36/92

The GA release of DeepSeek's open 1.6T-parameter MoE flagship for advanced reasoning and long-horizon agents.

1.0M ctx$0.66/$1.98 per M
Demos
All demos

No shared demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:Epoch ECI·Epoch AI· as of 2026-07-10
Capability
CapabilityECI77.0
Agentic
Novel Reasoning5.3%
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Capability
Capability—
Agentic
Novel Reasoning—
Specs
2M
Context
33K
Max output
—
Released
1.0M
Context
256K
Max output
Aug 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Pricing not available
Live pricing, shown before you run
Input$0.66/M tokens
Output$1.98/M tokens
Cache read$0.02/M tokens
Chat with Grok 4 FastGo to model
Chat with DeepSeek V4 Pro (0813)Go to model
Frequently Asked Questions: Grok 4 Fast vs DeepSeek V4 Pro (0813)▼

Which is better, Grok 4 Fast or DeepSeek V4 Pro (0813)?

▼

Both Grok 4 Fast and DeepSeek V4 Pro (0813) are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which has a larger context window, Grok 4 Fast or DeepSeek V4 Pro (0813)?

▼

Grok 4 Fast has a larger context window: Grok 4 Fast supports 2M tokens vs DeepSeek V4 Pro (0813) at 1M tokens.

Do both Grok 4 Fast and DeepSeek V4 Pro (0813) support vision?

▼

Grok 4 Fast supports vision/image input, but DeepSeek V4 Pro (0813) does not.

What are the key differences between Grok 4 Fast and DeepSeek V4 Pro (0813)?

▼

Key differences: only Grok 4 Fast supports vision input; only DeepSeek V4 Pro (0813) offers extended reasoning mode. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Grok 4 Fast and DeepSeek V4 Pro (0813) for free on idapt.app to see which performs better for your specific needs.

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