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Head-to-head comparison

Llama 3.1 Tulu 3 8B vs Phi 4 reasoning vision 15B

Llama 3.1 Tulu 3 8B (Allen Institute) and Phi 4 reasoning vision 15B (Microsoft) compared on the ModelCap Index, API price, context window, provider availability, weight access and every public benchmark board they share. Figures are the same ones shown on the live rankings; nothing here is a hidden score.

Snapshot as of 22 September 2026

As of 22 September 2026, Phi 4 reasoning vision 15B holds the stronger ModelCap Index position (#206 vs #208); and Phi 4 reasoning vision 15B ships open weights.

Which should you choose?

Choose Llama 3.1 Tulu 3 8B if…

  • ModelCap publishes no field on which Llama 3.1 Tulu 3 8B leads Phi 4 reasoning vision 15B for this pair.

Choose Phi 4 reasoning vision 15B if…

  • you want the stronger overall ModelCap Index position — #206 against #208 (10.4 vs 8.7 points).
  • you want to self-host: Phi 4 reasoning vision 15B ships open weights while Llama 3.1 Tulu 3 8B is restricted license.
  • you want the more recently listed model — Phi 4 reasoning vision 15B was listed 23 January 2026, Llama 3.1 Tulu 3 8B 20 November 2024.

Llama 3.1 Tulu 3 8B vs Phi 4 reasoning vision 15B: specs, pricing and context

Specification comparison of Llama 3.1 Tulu 3 8B and Phi 4 reasoning vision 15B
FieldLlama 3.1 Tulu 3 8BAllen InstitutePhi 4 reasoning vision 15BMicrosoft
ModelCap Index position#208#206
Index score8.710.4
EvidenceMeasuredInherited
Input price / 1M tokensUnlistedUnlisted
Output price / 1M tokensUnlistedUnlisted
Context window— tokens— tokens
Max output tokens——
API providers listed00
Weight accessRestricted licenseOpen weights
Input modalitiesTextText, Image
First listed20 November 202423 January 2026
PublisherAllen InstituteMicrosoft

Evidence: 1 public benchmark observation across 1 board · finetune of microsoft/Phi-4-reasoning · finetune (100%). Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: Llama 3.1 Tulu 3 8B vs Phi 4 reasoning vision 15B

Neither model has a published result on a public benchmark board ModelCap tracks yet.

Scores are the sources' own published figures for each model's best evaluated configuration; ModelCap never re-runs a benchmark.

Want a different pairing? Open the interactive comparison tool to swap either model for any current ranked language model.

Llama 3.1 Tulu 3 8B vs Phi 4 reasoning vision 15B: common questions

Is Llama 3.1 Tulu 3 8B better than Phi 4 reasoning vision 15B?

Phi 4 reasoning vision 15B ranks higher on the ModelCap Index as of 22 September 2026: #206 against #208. That is a capability ranking built from public benchmark evidence with published uncertainty; whether it is "better" for you also depends on price, context and where you can run it. Their published uncertainty intervals overlap, so the rank difference alone does not establish a reliable capability advantage for your workload.

Is Llama 3.1 Tulu 3 8B cheaper than Phi 4 reasoning vision 15B?

At least one of the two has no listed API price on ModelCap right now, so no price comparison is made.

Which has the bigger context window, Llama 3.1 Tulu 3 8B or Phi 4 reasoning vision 15B?

Both publish a —-token context window.

Which is better for coding, Llama 3.1 Tulu 3 8B or Phi 4 reasoning vision 15B?

The two models do not share a coding benchmark board on ModelCap yet, so no head-to-head coding score is published; the ModelCap Index position is the closest overall signal.

Are Llama 3.1 Tulu 3 8B and Phi 4 reasoning vision 15B open-weight models?

Llama 3.1 Tulu 3 8B: Restricted license. Phi 4 reasoning vision 15B: Open weights. Open weights mean the checkpoint can be downloaded and self-hosted under its licence; API-only models are available solely through hosted endpoints.

Where can I run Llama 3.1 Tulu 3 8B and Phi 4 reasoning vision 15B?

ModelCap currently lists 0 API providers for Llama 3.1 Tulu 3 8B and 0 for Phi 4 reasoning vision 15B, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this Llama 3.1 Tulu 3 8B vs Phi 4 reasoning vision 15B comparison?

Every figure comes from the sealed ModelCap dataset published 22 September 2026; the page re-renders within a minute of each data refresh, and the ModelCap Index positions are the same ones shown on the live rankings.

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