FLUX.2 klein 4B FP8 vs GPT-4.1
At a Glance
| Compare |  FLUX.2 klein 4B FP8Black Forest Labs |  GPT-4.1OpenAI |
|---|---|---|
| Intelligence, Cost, and Efficiency | ||
| IntelligenceHigher is better · MM Intelligence v2.5 | UnrankedNot in the 46-model eligible cohort | #44 of 463.7 score · 2/3 sources · provisional · missing LiveBench · full-core range 2.5–35.8 |
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | Not reported | $1.00Openrouter ↗ · Sep 3, 2026 |
| Output priceFrom · USD / 1M tokens | Not reported | $4.00Openrouter ↗ · Sep 3, 2026 |
| Context windowMaximum documented tokens | Not reported | 1,048K |
| Model facts checked | Aug 28, 2026View model evidence → | Aug 29, 2026View model evidence → |
Token prices are the lowest available sourced USD rates; input and output may use different providers. Cost ranking estimates output spend on LiveBench, not a full request bill. Ranking methodology →
Available Benchmarks
Side-by-Side Facts
| Field | FLUX.2-klein-4b-fp8 | GPT-4.1 |
|---|---|---|
| Developer | Black Forest Labs | OpenAI |
| Family | Flux 2 Klein 4b Fp8 | Gpt 4 1 |
| Model | FLUX.2-klein-4b-fp8 | GPT-4.1 |
| Version | FLUX.2-klein-4b-fp8 | GPT-4.1 |
| Lifecycle | active | active |
| Released | 2026-01-15 | Unknown |
| Knowledge cutoff | Unknown | 2024-06-01 |
| Input modalities | Image | Text, Image |
| Output modalities | Image | Text |
| Context window | Unknown | 1,048K |
| Total parameters | 4B | Unknown |
| Active parameters | Unknown | Unknown |
| License | apache-2.0 | Unknown |
| Open weights | Yes | No |
| API available | Unknown | Yes |
| Self-hostable | Yes | No |
| Provider access | Unknown | Openai (Standard), Openrouter (Standard) |
| Capabilities | generation | chat, generation, tools |
FLUX.2 klein 4B FP8 Capabilities
GPT-4.1 Capabilities
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Primary Evidence
Sources and Freshness
Questions
FLUX.2 klein 4B FP8 vs GPT-4.1 FAQs
Is FLUX.2 klein 4B FP8 or GPT-4.1 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both FLUX.2 klein 4B FP8 and GPT-4.1, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, FLUX.2 klein 4B FP8 or GPT-4.1?+
Only GPT-4.1 has a directly sourced input price: $1.00 per million tokens. Only GPT-4.1 has a directly sourced output price: $4.00 per million tokens.
Which has a larger context window, FLUX.2 klein 4B FP8 or GPT-4.1?+
Neither model has a larger sourced context window in this comparison. FLUX.2 klein 4B FP8 is — and GPT-4.1 is 1,048K.
Which performs better in benchmarks, FLUX.2 klein 4B FP8 or GPT-4.1?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can FLUX.2 klein 4B FP8 or GPT-4.1 be self-hosted?+
FLUX.2 klein 4B FP8 is the only model in this pair currently marked as self-hostable. FLUX.2 klein 4B FP8 is open weight; GPT-4.1 is not marked open weight.
Can FLUX.2 klein 4B FP8 and GPT-4.1 understand images?+
FLUX.2 klein 4B FP8 is documented with image input; GPT-4.1 is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, FLUX.2 klein 4B FP8 or GPT-4.1?+
Neither has a larger sourced maximum output. FLUX.2 klein 4B FP8 is — and GPT-4.1 is 33K.
Do FLUX.2 klein 4B FP8 and GPT-4.1 support reasoning and tool use?+
FLUX.2 klein 4B FP8: image input. GPT-4.1: tool calling and image input. Feature support does not establish relative quality.
Which is available from more inference providers, FLUX.2 klein 4B FP8 or GPT-4.1?+
FLUX.2 klein 4B FP8 has 0 sourced provider routes; GPT-4.1 has 2, so GPT-4.1 has broader tracked availability.
Which offers better value, FLUX.2 klein 4B FP8 or GPT-4.1?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.