AI Models · Open-Source vs Paid

Phi 4 Open vs XIMiMo-V2.6-Pro-UltraSpeed Paid

Phi 4 vs MiMo-V2.6-Pro-UltraSpeed compared — price per token, context window, multimodality, openness and which to choose. Can the open-source model replace the paid one? Full 2026 breakdown.

Prices & specs refreshed from live data · olud.ai

Open-model prices = cheapest provider via OpenRouter; official maker rates may be higher.

Phi 4OpenMicrosoft
$0.07 /M input
$0.14 /M outputNo per-token fees if you self-host
TypeOpen-weight
Context window16K tokens
MultimodalNo
Self-hostYes
XIMiMo-V2.6-Pro-UltraSpeedPaidXiaomi
$4.35 /M input
$8.7 /M outputManaged API (no infra to run)
TypeProprietary
Context window1M tokens
MultimodalYes
Self-hostNo
Choose Phi 4 if you want to self-host, keep your data private and skip per-token fees — it's open-weight and runs on your own hardware. Choose MiMo-V2.6-Pro-UltraSpeed if you want frontier capability through a managed API with zero infrastructure to run.

Phi 4 vs MiMo-V2.6-Pro-UltraSpeed specs

SpecPhi 4MiMo-V2.6-Pro-UltraSpeedWinner
MakerMicrosoftXiaomi–
TypeOpen-weightProprietaryPhi 4
Context window16K tokens1M tokensXIMiMo-V2.6-Pro-UltraSpeed
Input price$0.07/M · free self-host$4.35/MPhi 4
Output price$0.14/M · free self-host$8.7/MPhi 4
Vision / multimodalNoYesXIMiMo-V2.6-Pro-UltraSpeed
Tool / function callingNoYesXIMiMo-V2.6-Pro-UltraSpeed
Self-hostableYesNo (API only)Phi 4
LicenseMITProprietaryPhi 4

Price gap & when to choose each

62×cheaper per output token

Phi 4 is ~62× cheaper than MiMo-V2.6-Pro-UltraSpeed on output tokens ($0.14 vs $8.7 per M tokens).

Choose Phi 4 if…
  • 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
XIChoose MiMo-V2.6-Pro-UltraSpeed if…
  • You want frontier performance through a managed API
  • You need the longer 1M context window
  • You value reliability & ecosystem
  • You don't want to manage infrastructure

Feature comparison

CapabilityPhi 4MiMo-V2.6-Pro-UltraSpeed
Open weights (downloadable)✓✗
Self-hostable✓✗
Runs fully offline✓✗
Vision / multimodal✗✓
Tool / function calling✗✓
1M+ context window✗✓

Benchmarks: Phi 4 vs MiMo-V2.6-Pro-UltraSpeed

Independent benchmark scores measured by Artificial Analysis. Higher is better (except latency).

Phi 4
MiMo-V2.6-Pro-UltraSpeed
Intelligence index
5.9
–
Math index
18
–
GPQA
57.5%
–
MMLU-Pro
71.4%
–
Humanity's Last Exam
3.8%
–
Long Context Reasoning
0%
–
LiveCodeBench
23.1%
–
MATH-500
81%
–
AIME
14.3%
–
AIME 2025
18%
–
IFBench
23.5%
–
τ²-Bench
0%
–
Terminal-Bench Hard
3.8%
–
Speed
41.8 tok/s
–
Latency
1.07s
–
Intelligence per $
26.9
–

Benchmark data by Artificial Analysis.

How Phi 4 and MiMo-V2.6-Pro-UltraSpeed score

🏆 Best value & openness: Phi 4 (3.8 vs 3.2 / 5)
CriterionPhi 4MiMo-V2.6-Pro-UltraSpeed
Cost-efficiency5.03.5
Context window2.05.0
Openness5.01.5
Self-hosting5.01.0
Multimodality2.05.0

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

Phi 4 Open

Microsoft · Open-weight

[Microsoft Research](/microsoft) Phi-4 is designed to perform well in complex reasoning tasks and can operate efficiently in situations with limited memory or where quick responses are needed. At 14 billion...

MiMo-V2.6-Pro-UltraSpeed Paid

Xiaomi · Proprietary

MiMo-V2.6-Pro-UltraSpeed is the fast speed edition of Xiaomi's flagship foundation model, MiMo-V2.6-Pro. Built from the same 1T MiMo-V2.6-Pro checkpoint, it matches the original model in quality while delivering roughly 10x...

Frequently asked questions

Is Phi 4 as good as MiMo-V2.6-Pro-UltraSpeed?

Phi 4 is open-weight and competitive on many tasks, but MiMo-V2.6-Pro-UltraSpeed may still lead on the hardest reasoning and agentic work. The gap keeps narrowing — benchmark both on your actual use case before deciding.

Can I run Phi 4 locally?

Yes. Phi 4 has open weights, so you can self-host it on your own GPUs or run it via a low-cost API. MiMo-V2.6-Pro-UltraSpeed is API-only and cannot be self-hosted.

How much cheaper is Phi 4?

Phi 4 costs $0.14/M output vs $8.7/M for MiMo-V2.6-Pro-UltraSpeed — roughly 62x cheaper via API, and free if you self-host.

Phi 4 vs MiMo-V2.6-Pro-UltraSpeed — which should I pick in 2026?

Choose Phi 4 if you want to self-host, keep your data private and skip per-token fees — it's open-weight and runs on your own hardware. Choose MiMo-V2.6-Pro-UltraSpeed if you want frontier capability through a managed API with zero infrastructure to run.

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