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Ember-1 vs Phi 4 Reasoning Plus

Ember-1 leads the LLM Stats Score 43.1 to 15.0.

Fireworks AI · Microsoft · Updated for 2026

Which is better?

Ember-1 leads the overall LLM Stats Score 43.1 to 15.0, ranking #51 overall.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Ember-1

  • overall performance matters — it scores 43.1 and ranks #51 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you want the most recent training data — it shipped Sep 2026

Choose Phi 4 Reasoning Plus

  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Ember-1
Fireworks AI
Phi 4 Reasoning Plus
Microsoft
Core performance indexes
LLM Stats Score
43.1
#51
15.0
#247
Reasoning
38.6
#71
15.4
#240
Coding
37.0
#22
5.6
#210
Cost, coverage & limits
Benchmark wins
—
—
Input price
$3.00 / M
— / M
Output price
$15.00 / M
— / M
Context window
1,040,000
—

Individual benchmarks

4 reported for Ember-1 · 11 for Phi 4 Reasoning Plus

No common benchmarks found

Ember-1 and Phi 4 Reasoning Plusdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Model Size

Parameter count comparison

2766.0B diff

Ember-1 has 2766.0B more parameters than Phi 4 Reasoning Plus, making it 19757.1% larger.

Fireworks AI
Ember-1
2.8Tparameters
Microsoft
Phi 4 Reasoning Plus
14.0Bparameters
2780.0B
Ember-1
14.0B
Phi 4 Reasoning Plus

Context Window

Maximum input and output token capacity

Only Ember-1 specifies input context (1,040,000 tokens).

Fireworks AI
Ember-1
Input1,040,000 tokens
Output- tokens
Microsoft
Phi 4 Reasoning Plus
Input- tokens
Output- tokens
Thu Oct 08 2026 • llm-stats.com

License

Usage and distribution terms

Ember-1 is licensed under a proprietary license, while Phi 4 Reasoning Plus uses MIT.

License differences may affect how you can use these models in commercial or open-source projects.

Ember-1

Proprietary

Closed source

Phi 4 Reasoning Plus

MIT

Open weights

Release Timeline

When each model was launched

Ember-1 was released on 2026-09-23, while Phi 4 Reasoning Plus was released on 2025-04-30.

Ember-1 is 17 months newer than Phi 4 Reasoning Plus.

Ember-1

Sep 23, 2026

2 weeks ago

1.4yr newer
Phi 4 Reasoning Plus

Apr 30, 2025

1.4 years ago

Knowledge Cutoff

When training data ends

Phi 4 Reasoning Plus has a documented knowledge cutoff of 2025-03-01, while Ember-1's cutoff date is not specified.

We can confirm Phi 4 Reasoning Plus's training data extends to 2025-03-01, but cannot make a direct comparison without Ember-1's cutoff date.

Ember-1

—

Phi 4 Reasoning Plus

Mar 2025

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Ember-1 and Phi 4 Reasoning Plus side-by-side, then vote on the output you prefer.

Ember-1
✓ Preferred
Phi 4 Reasoning Plus
Open in Playground

FAQ

Common questions about Ember-1 vs Phi 4 Reasoning Plus.

Which is better, Ember-1 or Phi 4 Reasoning Plus?

Ember-1 leads the LLM Stats Score 43.1 to 15.0. Ember-1 is made by Fireworks AI and Phi 4 Reasoning Plus is made by Microsoft. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Ember-1 compare to Phi 4 Reasoning Plus in benchmarks?

Ember-1 scores SWE-Bench Verified: 92.2%, Terminal-Bench 2.1: 82.0%, DeepSWE 1.1: 75.2%, Tau2 Airline: 66.0%. Phi 4 Reasoning Plus scores FlenQA: 97.9%, HumanEval+: 92.3%, IFEval: 84.9%, OmniMath: 81.9%, AIME 2024: 81.3%.

What are the context window sizes for Ember-1 and Phi 4 Reasoning Plus?

Ember-1 supports 1.0M tokens and Phi 4 Reasoning Plus supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Ember-1 and Phi 4 Reasoning Plus?

Key differences include LLM Stats Score (43.1 vs 15.0), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes Ember-1 and Phi 4 Reasoning Plus?

Ember-1 is developed by Fireworks AI and Phi 4 Reasoning Plus is developed by Microsoft.

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