Phi-4-mini vs Solar Pro 2 vs Reka Flash 3
Phi-4-mini comes out ahead, 56 to 51 and 50 on our weighted score.
- Our pick
MicrosoftPhi-4-mini
56/100- ECI—
- Price$0.075 / $0.30
- Context128K
UpstageSolar Pro 2
51/100- ECI—
- Price$0.25 / $0.25
- Context66K
Reka AIReka Flash 3
50/100- ECI—
- Price$0.10 / $0.20
- Context66K
Phi-4-mini is our pick
Phi-4-mini is the better all-round choice, scoring 56/100 against Solar Pro 2 (51) and Reka Flash 3 (50). It leads on context window. Solar Pro 2 wins on inputs & features. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
- CapabilityNot enough dataNo independent benchmark covers every model here yet
- Lowest priceReka Flash 3Reka Flash 3 $0.125 · Phi-4-mini $0.131 · Solar Pro 2 $0.25 per 1M tokens (3:1 blend)
- Longest contextPhi-4-miniPhi-4-mini 128,000 · Solar Pro 2 65,536 · Reka Flash 3 65,536 tokens
- Widest inputsSame inputsPhi-4-mini: Text · Solar Pro 2: Text · Reka Flash 3: Text
- Self-hostingPhi-4-mini and Reka Flash 3Publishes downloadable weights
| Measure | Weight | Phi-4-mini | Solar Pro 2 | Reka Flash 3 |
|---|---|---|---|---|
| Price | 50% | 88 | 75 | 89 |
| Inputs & features | 30% | 25 | 35 | 10 |
| Context window | 20% | 24 | 12 | 12 |
| Overall | 100% | 56/100 | 51/100 | 50/100 |
Left out because at least one model lacks the data: capability. The remaining weights were rescaled.
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | Phi-4-miniMicrosoft | Solar Pro 2Upstage | Reka Flash 3Reka AI |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | — | — | — |
| ECI rank | — | — | — |
| Price per million tokens | |||
| Input | $0.075 (best) | $0.25 | $0.10 |
| Output | $0.30 | $0.25 | $0.20 (best) |
| Cached input | — | — | — |
| Blended (3:1) | $0.131 | $0.25 | $0.125 (best) |
| Long-context rate | Same rate | Same rate | Same rate |
| Price source | Official Azure API | Official Upstage API | Median of 3 providers |
| Limits | |||
| Context window | 128,000 tokens (best) | 65,536 tokens | 65,536 tokens |
| Max output | 4,096 tokens | 8,192 tokens | 58,982 tokens (best) |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | No | No | No |
| PDFs | No | No | No |
| Audio | No | No | No |
| Video | No | No | No |
| Reasoning | No | Yesminimal · high | Yes |
| Tool calling | Yes | Yes | No |
| Structured output | No | No | No |
| Availability | |||
| Weights | Open | Proprietary | Open |
| API model ID | phi-4-mini | solar-pro2 | — |
| API providers | 2 | 2 | 3 (best) |
| Released | Feb 26, 2025 | May 20, 2025 | Mar 10, 2025 |
| Knowledge cutoff | Jun 2024 | Mar 2025 | Jan 31, 2025 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Phi-4-mini$1.35
- Solar Pro 2$3.00
- Reka Flash 3$1.40
Which should you choose?
Which is better: Phi-4-mini, Solar Pro 2 or Reka Flash 3?
Phi-4-mini is the better all-round choice, scoring 56/100 against Solar Pro 2 (51) and Reka Flash 3 (50). It leads on context window. Solar Pro 2 wins on inputs & features. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
Which is cheaper, Phi-4-mini, Solar Pro 2 or Reka Flash 3?
Reka Flash 3 is cheaper at $0.10 input / $0.20 output per million tokens (median across 3 API providers). Phi-4-mini costs $0.075 input / $0.30 output per million tokens (official Azure API price); Solar Pro 2 costs $0.25 input / $0.25 output per million tokens (official Upstage API price). At a typical mix of three input tokens to one output token, that is $0.125 per million tokens for Reka Flash 3 versus $0.131 for Phi-4-mini (1× as much) and $0.25 for Solar Pro 2 (2× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers all three models yet. Phi-4-mini has not been scored yet, Solar Pro 2 has not been scored yet and Reka Flash 3 has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Phi-4-mini, Solar Pro 2 and Reka Flash 3 yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Note that Reka Flash 3 does not support tool calling, which most coding agents need.
Which has the bigger context window?
Phi-4-mini has the largest context window at 128,000 tokens, against 65,536 for Solar Pro 2 and 65,536 for Reka Flash 3. Maximum output per response: Phi-4-mini up to 4,096, Solar Pro 2 up to 8,192, Reka Flash 3 up to 58,982 tokens.
Which can read images, PDFs, audio or video?
Phi-4-mini accepts text; Solar Pro 2 accepts text; Reka Flash 3 accepts text. They handle the same number of input types.
Are any of these open source?
Phi-4-mini and Reka Flash 3 publishes its weights and can be self-hosted; Solar Pro 2 is proprietary.
Which is newer?
Solar Pro 2 is the newest, released May 20, 2025. Reka Flash 3 came out Mar 10, 2025; Phi-4-mini came out Feb 26, 2025. Knowledge cutoff: Phi-4-mini Jun 2024, Solar Pro 2 Mar 2025, Reka Flash 3 Jan 31, 2025.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Nov 2, 2026.
