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Baidu: ERNIE 4.5 VL 28B A3B vs xAI: Grok 4 Fast

Head-to-head API cost, context, and performance comparison. Synced at 2:39:34 PM.

Executive Summary

When evaluating Baidu: ERNIE 4.5 VL 28B A3B against xAI: Grok 4 Fast, the pricing structure is a key differentiator. Both models are remarkably similar in API costs.

However, when looking at raw reasoning capabilities, xAI: Grok 4 Fast leads with a statistical ELO score of 1443. For tasks involving complex logic, coding, or instruction-following, developers might prefer xAI: Grok 4 Fast, provided their budget allows for the API burn rate.

Raw Technical comparison

Metric
Baidu: ERNIE 4.5 VL 28B A3B
xAI: Grok 4 Fast
Performance (ELO)
1443
1443
Input Cost / 1M
$0.14
$0.20
Output Cost / 1M
$0.56
$0.50
Context Window
30,000 tokens
2,000,000 tokens

Verdict

If you are looking for pure performance and capability, Tie is statistically superior. However, if API burn rate is the primary concern, xAI: Grok 4 Fast wins out aggressively in pricing.

People Also Ask

Is Baidu: ERNIE 4.5 VL 28B A3B cheaper than xAI: Grok 4 Fast?

No. xAI: Grok 4 Fast is the more cost-effective model, operating at a lower price point per 1 million tokens.

Which model has the larger context window?

The xAI: Grok 4 Fast model has the advantage in memory, offering a massive 2,000,000 token limit for document ingestion.

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