Model Comparison

DeepSeek-V4-Flash-0731 vs Phi 4Which is better in 2026?

Comparing DeepSeek-V4-Flash-0731 and Phi 4 across benchmarks, pricing, and capabilities.

Verdict: DeepSeek-V4-Flash-0731 vs Phi 4 — which is better?

DeepSeek-V4-Flash-0731 (by DeepSeek) and Phi 4 (by Microsoft) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

On price, Phi 4 is roughly 1.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

DeepSeek-V4-Flash-0731 also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

Choose DeepSeek-V4-Flash-0731 if…

  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Jul 2026

Choose Phi 4 if…

  • cost matters — it's about 1.3x cheaper per token

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

DeepSeek-V4-Flash-0731 and Phi 4don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Phi 4 costs less

For input processing, DeepSeek-V4-Flash-0731 ($0.09/1M tokens) is 1.3x more expensive than Phi 4 ($0.07/1M tokens).

For output processing, DeepSeek-V4-Flash-0731 ($0.18/1M tokens) is 1.3x more expensive than Phi 4 ($0.14/1M tokens).

In conclusion, DeepSeek-V4-Flash-0731 is more expensive than Phi 4.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Tue Aug 04 2026 • llm-stats.com
DeepSeek
DeepSeek-V4-Flash-0731
Input tokens$0.09
Output tokens$0.18
Best providerDeepinfra
Microsoft
Phi 4
Input tokens$0.07
Output tokens$0.14
Best providerDeepinfra
Notice missing or incorrect data?Start an Issue→

Model Size

Parameter count comparison

289.3B diff

DeepSeek-V4-Flash-0731 has 289.3B more parameters than Phi 4, making it 1968.0% larger.

DeepSeek
DeepSeek-V4-Flash-0731
304.0Bparameters
Microsoft
Phi 4
14.7Bparameters
304.0B
DeepSeek-V4-Flash-0731
14.7B
Phi 4

Context Window

Maximum input and output token capacity

DeepSeek-V4-Flash-0731 accepts 1,048,576 input tokens compared to Phi 4's 16,000 tokens. DeepSeek-V4-Flash-0731 can generate longer responses up to 65,536 tokens, while Phi 4 is limited to 16,000 tokens.

DeepSeek
DeepSeek-V4-Flash-0731
Input1,048,576 tokens
Output65,536 tokens
Microsoft
Phi 4
Input16,000 tokens
Output16,000 tokens
Tue Aug 04 2026 • llm-stats.com

License

Usage and distribution terms

Both models are licensed under MIT.

Both models share the same licensing terms, providing consistent usage rights.

DeepSeek-V4-Flash-0731

MIT

Open weights

Phi 4

MIT

Open weights

Release Timeline

When each model was launched

DeepSeek-V4-Flash-0731 was released on 2026-07-31, while Phi 4 was released on 2024-12-12.

DeepSeek-V4-Flash-0731 is 20 months newer than Phi 4.

DeepSeek-V4-Flash-0731

Jul 31, 2026

4 days ago

1.6yr newer
Phi 4

Dec 12, 2024

1.6 years ago

Knowledge Cutoff

When training data ends

Phi 4 has a documented knowledge cutoff of 2024-06-01, while DeepSeek-V4-Flash-0731's cutoff date is not specified.

We can confirm Phi 4's training data extends to 2024-06-01, but cannot make a direct comparison without DeepSeek-V4-Flash-0731's cutoff date.

DeepSeek-V4-Flash-0731

—

Phi 4

Jun 2024

Provider Availability

DeepSeek-V4-Flash-0731 is available from DeepInfra, Fireworks, Novita. Phi 4 is available from DeepInfra.

DeepSeek-V4-Flash-0731

deepinfra logo
Deepinfra
Input Price:Input: $0.09/1MOutput Price:Output: $0.18/1M
fireworks logo
Fireworks
Input Price:Input: $0.14/1MOutput Price:Output: $0.28/1M
novita logo
Novita
Input Price:Input: $0.14/1MOutput Price:Output: $0.28/1M

Phi 4

deepinfra logo
Deepinfra
Input Price:Input: $0.07/1MOutput Price:Output: $0.14/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

DeepSeek
Larger context window (1,048,576 tokens)
Microsoft
Less expensive input tokens
Less expensive output tokens

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against DeepSeek-V4-Flash-0731 and Phi 4 side-by-side, then vote on the output you prefer.

DeepSeek-V4-Flash-0731
✓ Preferred
Phi 4
Open in Playground
AI Model Comparison Table
Feature
DeepSeek
DeepSeek-V4-Flash-0731
Microsoft
Phi 4

FAQ

Common questions about DeepSeek-V4-Flash-0731 vs Phi 4.

Which is better, DeepSeek-V4-Flash-0731 or Phi 4?

DeepSeek-V4-Flash-0731 (DeepSeek) and Phi 4 (Microsoft) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does DeepSeek-V4-Flash-0731 compare to Phi 4 in benchmarks?

DeepSeek-V4-Flash-0731 scores Terminal-Bench 2.1: 82.7%, CyberGym: 76.7%, Toolathlon: 70.3%, DSBench-FullStack: 68.7%, DSBench-Hard: 59.6%. Phi 4 scores MMLU: 84.8%, HumanEval+: 82.8%, HumanEval: 82.6%, MGSM: 80.6%, MATH: 80.4%.

Is DeepSeek-V4-Flash-0731 cheaper than Phi 4?

Phi 4 is 1.3x cheaper for input tokens. DeepSeek-V4-Flash-0731 costs $0.09/M input and $0.18/M output via deepinfra. Phi 4 costs $0.07/M input and $0.14/M output via deepinfra.

What are the context window sizes for DeepSeek-V4-Flash-0731 and Phi 4?

DeepSeek-V4-Flash-0731 supports 1.0M tokens and Phi 4 supports 16K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between DeepSeek-V4-Flash-0731 and Phi 4?

Key differences include context window (1.0M vs 16K), input pricing ($0.09 vs $0.07/M). See the full comparison above for benchmark-by-benchmark results.

Who makes DeepSeek-V4-Flash-0731 and Phi 4?

DeepSeek-V4-Flash-0731 is developed by DeepSeek and Phi 4 is developed by Microsoft.

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