Model reference · Synced 2025-04-29
FLUX.2 Klein 4B
FLUX.2 Klein 4B is an AI model from OpenRouter. 41K context window. Capabilities: multimodal vision, open weights. Available on 1 provider. Cheapest listing: $0 input / $0 output per 1M tokens.
Quick facts
- Cheapest input: $0 per 1M tokens (OpenRouter)
- Cheapest output: $0 per 1M tokens
- Context window: 41K tokens
- Max output: 41K tokens
- Release date: 2026-01-14
- Knowledge cutoff: 2025-06
- Capabilities: multimodal vision, open weights
- Provider count: 1
Provider pricing
Same model, different providers, different prices. Cheapest first.
| Provider | Input / 1M | Output / 1M | Context | Listed |
|---|---|---|---|---|
| OpenRouter | $0 | $0 | 41K | 2026-01-14 |
Prices synced daily from models.dev + provider docs.
How to use this model
If you're picking FLUX.2 Klein 4B for a project, the three things that matter most:
- Compare it side-by-side with one or two alternatives in the live comparison tool. Pricing differences matter more than benchmarks at scale.
- Pick the cheapest provider that meets your latency / SLA need. Big spread across providers for the same weights.
- Re-evaluate every 3 months. Frontier prices drop fast; a model that's cheapest today may not be in a quarter.
Related models
FAQ
How much does FLUX.2 Klein 4B cost? $0 input / $0 output per 1M tokens at the cheapest listing. See the table above for other providers.
What is the context window? 41K tokens.
Which providers offer it? OpenRouter.
Where do these numbers come from? models.dev + provider documentation, synced daily. About the data.