OpenAI vs Mistral AI Pricing
Per-million-token pricing for OpenAI and Mistral AI, with side-by-side flagship models, cheapest tiers, and context windows. Pricing data syncs weekly from a continuously-updated model catalog — last updated May 22, 2026.
As of May 22, 2026, Mistral AI offers the lowest output-token price at $0.04/1M (Ministral 3B — $0.04/1M output).
Who wins on what
Cheapest input tokens
$0.02/1MMistral AI
Mistral Nemo — $0.02/1M input
Cheapest output tokens
$0.04/1MMistral AI
Ministral 3B — $0.04/1M output
Longest context window
2.0MOpenAI
gpt-5.4 (>272K context length) — 2.0M input tokens
Lowest average output cost
$2.18/1MMistral AI
Provider-wide average across 82 models
Largest model catalog
140 modelsOpenAI
More options to match cost vs capability
Most reasoning models
11 modelsOpenAI
Models with dedicated reasoning / thinking support
Most vision models
10 modelsOpenAI
Models that accept image input
Open-weights available
YesMistral AI
Offers open-weight models you can self-host
Side-by-side
OpenAI
Cheapest input
$0.030
gpt-oss-20b
Cheapest output
$0.140
gpt-oss-20b
Longest context
2.0M
gpt-5.4 (>272K context length)
Avg output / 1M
$28.06
Across catalog
Cheapest cached input
$0.125
GPT-5.1 Codex Max
| Model | In/1M | Out/1M | Ctx |
|---|---|---|---|
| GPT-5.5 Pro VisionReasoningTools | $30.00 | $180.00 | 1.1M |
| GPT-5.5 VisionReasoningToolsCache | $5.00 | $30.00 | 1.1M |
| gpt-5.4-mini | $0.750 | $4.50 | 272K |
| gpt-5.4-nano | $0.200 | $1.25 | 272K |
| GPT-5.4 Pro VisionReasoningTools | $30.00 | $180.00 | 1.1M |
| gpt-oss-20b | $0.030 | $0.140 | 131K |
Mistral AI
Cheapest input
$0.020
Mistral Nemo
Cheapest output
$0.040
Ministral 3B
Longest context
262K
Devstral 2
Avg output / 1M
$2.18
Across catalog
| Model | In/1M | Out/1M | Ctx |
|---|---|---|---|
| Mistral Medium VisionReasoningTools | $1.50 | $7.50 | 262K |
| Mistral Medium 3.5 VisionReasoningTools | $1.50 | $7.50 | 262K |
| Mistral Small 4 VisionReasoningTools | $0.150 | $0.600 | 256K |
| Devstral 2 Tools | $0.400 | $2.00 | 262K |
| Mistral Large 3 VisionTools | $0.500 | $1.50 | 262K |
| Ministral 3B | $0.040 | $0.040 | 131K |
All prices in USD per 1 million tokens. Showing top 6 models per provider, sorted by output cost.
Related comparisons
Run the numbers for your workload
Calcaas multiplies per-token costs by your real usage patterns — inputs, outputs, retries, and conversation history — across both providers in one model.