Grok 4.3 vs Mistral Medium 3.5

Both are Mid-tier models, from xAI and Mistral AI respectively. Grok 4.3 is the cheaper choice overall at a 4:1 input:output ratio.

Which is cheaper

Input price: Grok 4.3 is cheaper ($1.25 vs $1.50).
Output price: Grok 4.3 is cheaper ($2.50 vs $7.50).
Blended, 4:1 input:output ratio: Grok 4.3 is 44.4% cheaper ($1.50 vs $2.70 per weighted 1M tokens).

Side by side

Spec	Grok 4.3	Mistral Medium 3.5
Provider	xAI	Mistral AI
Tier	Mid	Mid
Context window	1M	256K
Max output	—	—
Input $/1M	$1.25	$1.50
Output $/1M	$2.50	$7.50
Cache read $/1M	$0.20	—
Modalities	text, image	text

Grok 4.3. Short-context rate, for prompts under 200K tokens. At 200K and above: $2.50 input / $5 output, cache read $0.40 per 1M. Eligible for a 20% Batch API discount.

Sources

Grok 4.3 — verified August 29, 2026

Mistral Medium 3.5 — verified August 29, 2026

Full Grok 4.3 pricing page → · Full Mistral Medium 3.5 pricing page →