Kimi K3 (batch) Open vs 
Mistral Medium 3.5 (batch) Open
Kimi K3 (batch) vs Mistral Medium 3.5 (batch) compared — price per token, context window, multimodality, openness and which to choose. Full 2026 breakdown.
Prices & specs refreshed from live data · olud.ai
Open-model prices = cheapest provider via OpenRouter; official maker rates may be higher.
$15 /M outputNo per-token fees if you self-host
$3.75 /M outputNo per-token fees if you self-host
Kimi K3 (batch) vs Mistral Medium 3.5 (batch) specs
| Spec | Kimi K3 (batch) | Mistral Medium 3.5 (batch) | Winner |
|---|---|---|---|
| Maker | Moonshot AI | Mistral AI | – |
| Type | Open-weight | Open-weight | – |
| Context window | 1M tokens | 262K tokens | |
| Input price | $3/M · free self-host | $0.75/M · free self-host | |
| Output price | $15/M · free self-host | $3.75/M · free self-host | |
| Vision / multimodal | Yes | Yes | = Tie |
| Tool / function calling | Yes | Yes | = Tie |
| Self-hostable | Yes | Yes | = Tie |
| License | Modified MIT | Apache 2.0 | – |
Price gap & when to choose each
Mistral Medium 3.5 (batch) is ~4.0× cheaper than Kimi K3 (batch) on output tokens ($3.75 vs $15 per M tokens).
- You want to self-host or run on your cloud
- You need the longer 1M context window
- You prioritize data privacy & control
- You are building open or reproducible AI
- You want to self-host or run on your cloud
- You prioritize data privacy & control
- You want the lowest operating costs
- You are building open or reproducible AI
Feature comparison
| Capability | Kimi K3 (batch) | Mistral Medium 3.5 (batch) |
|---|---|---|
| Open weights (downloadable) | ✓ | ✓ |
| Self-hostable | ✓ | ✓ |
| Runs fully offline | ✓ | ✓ |
| Vision / multimodal | ✓ | ✓ |
| Tool / function calling | ✓ | ✓ |
| 1M+ context window | ✓ | ✗ |
Benchmarks: Kimi K3 (batch) vs Mistral Medium 3.5 (batch)
Independent benchmark scores measured by Artificial Analysis. Higher is better (except latency).
Benchmark data by Artificial Analysis.
How Kimi K3 (batch) and Mistral Medium 3.5 (batch) score
| Criterion | Kimi K3 (batch) | Mistral Medium 3.5 (batch) |
|---|---|---|
| Cost-efficiency | 3.0 | 4.0 |
| Context window | 5.0 | 4.0 |
| Openness | 5.0 | 5.0 |
| Self-hosting | 5.0 | 5.0 |
| Multimodality | 5.0 | 5.0 |
Scores come from live data — output price (cost), context length, open vs closed weights (openness & self-hosting) and vision/tool support (multimodality). Raw task quality isn't scored here; it depends on your benchmark — see the verdict.
What each model is
Kimi K3 (batch) Open
Kimi K3 is a 2.8T parameter open-weight multimodal reasoning model from Moonshot AI. It is suited for complex coding, knowledge work, and long-horizon agentic workflows, and is particularly strong at...
Mistral Medium 3.5 (batch) Open
Mistral Medium 3.5 is a dense 128B instruction-following model from Mistral AI. It supports text and image inputs with text output, and is designed for agentic workflows, coding, and complex...
Other models in these families
These variants are tracked but not compared here — one page per family keeps the comparison readable.
Frequently asked questions
Kimi K3 (batch) vs Mistral Medium 3.5 (batch) — which is cheaper?
Mistral Medium 3.5 (batch) is cheaper on output ($3.75/M vs $15/M).
Which has the larger context window?
Kimi K3 (batch) offers the larger context window (1M tokens).
Kimi K3 (batch) vs Mistral Medium 3.5 (batch) — which should I pick in 2026?
Choose Mistral Medium 3.5 (batch) for the lower output price ($3.75/M vs $15/M). Choose Kimi K3 (batch) if you need the larger 1M context window.
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