DeepSeek V4 Flash vs Phi-3 Mini 4k
DeepSeek V4 Flash (2026) and Phi-3 Mini 4k (2024) are frontier reasoning models from DeepSeek and Microsoft Research. DeepSeek V4 Flash ships a 1m-token context window, while Phi-3 Mini 4k ships a 4k-token context window. On MMLU PRO, DeepSeek V4 Flash leads by 40.7 pts. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Pick DeepSeek V4 Flash for general evaluation; Phi-3 Mini 4k is better when provider fit matters more.
Decision scorecard
Local evidence first| Signal | DeepSeek V4 Flash | Phi-3 Mini 4k |
|---|---|---|
| Best for | reasoning-heavy apps, tool-calling agents, and long-context analysis | provider-routed production |
| Decision fit | Coding, RAG, and Agents | Coding and Classification |
| Context window | 1m | 4k |
| Cheapest output | $0.12/1M tokens | $0.25/1M tokens |
| Provider routes | 5 tracked | 4 tracked |
| Shared benchmarks | MMLU PRO leader | 4 shared |
Decision tradeoffs
- DeepSeek V4 Flash holds a shared-benchmark lead on MMLU PRO, ahead by 40.7 points.
- DeepSeek V4 Flash has the larger context window for long prompts, retrieval packs, or transcript analysis.
- DeepSeek V4 Flash has the lower cheapest tracked output price at $0.12/1M tokens.
- DeepSeek V4 Flash has broader tracked provider coverage for fallback and route flexibility.
- DeepSeek V4 Flash uniquely exposes Reasoning, JSON / Tool use, and Structured outputs in local model data.
- Local decision data tags Phi-3 Mini 4k for Coding and Classification.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
DeepSeek V4 Flash
$76.26
Cheapest tracked route/tier: OpenRouter
Phi-3 Mini 4k
$103
Cheapest tracked route/tier: Replicate API
Estimated monthly gap: $26.24. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on Microsoft Foundry; start route-level A/B tests there.
- Phi-3 Mini 4k is $0.13/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Check replacement coverage for Reasoning, JSON / Tool use, and Structured outputs before moving production traffic.
- Provider overlap exists on Microsoft Foundry; start route-level A/B tests there.
- DeepSeek V4 Flash is $0.13/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- DeepSeek V4 Flash adds Reasoning, JSON / Tool use, and Structured outputs in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-04-24 | 2024-04-23 |
| Context window | 1m | 4k |
| Parameters | 284B | 3.8B |
| Architecture | Mixture of Experts | Decoder Only |
| License | MITOSI-approved | MITOSI-approved |
| Openness | Open source | Open source |
| Weights | Available | Unknown |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: permitted | Commercial use: permitted |
| Knowledge cutoff | - | 2023-10 |
Pricing and availability
| Pricing attribute | DeepSeek V4 Flash | Phi-3 Mini 4k |
|---|---|---|
| Input price |
| $0.05/1M tokens |
| Output price |
| $0.25/1M tokens |
| Providers |
Capabilities
| Capability | DeepSeek V4 Flash | Phi-3 Mini 4k |
|---|---|---|
| Vision | No | No |
| Multimodal | No | No |
| Reasoning | Yes | No |
| JSON / Tool use | Yes | No |
| Structured outputs | Yes | No |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | DeepSeek V4 Flash | Phi-3 Mini 4k |
|---|---|---|
| MMLU PRO | 86.4 | 45.7 |
| Google-Proof Q&A | 88.1 | 40.9 |
| HumanEval | 69.5 | 59.8 |
| Massive Multitask Language Understanding | 88.7 | 68.2 |
Continue comparing
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Last reviewed: 2026-07-03. Data sourced from public model cards and provider documentation.