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GPT-5.4 Nano vs Mistral Small 4

List-price comparison · GPT-5.4 Nano details · Mistral Small 4 details

For a typical workload (100,000 requests / mo), Mistral Small 4 costs 43% less $42.00/mo vs $74.00/mo.

 GPT-5.4 NanoMistral Small 4
Input / 1M tokens$0.200$0.150
Output / 1M tokens$1.25$0.600
Typical request (1,200 in + 400 out)$0.0007$0.0004
Context window400k tokens262,144 tokens
Max output128k tokens
TierFlashFlash
ProviderOpenAIMistral AI

Projected monthly cost

Rows open both models in the calculator — adjust volume and token counts there.

GPT-5.4 Nano

Cheapest OpenAI option for high-throughput classification, tagging, and routing — ideal as a first-pass filter before a stronger model.

Limited reasoning depth means it should be treated as a triage layer, not a final answer source, for anything business-critical.

Mistral Small 4

Auto-synced from OpenRouter — no editorial write-up yet.

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Vendor list rates · per-request examples assume 1,200 input + 400 output tokens.