Kimi K3.1 Pro vs Ember-1
Kimi K3.1 Pro comes out ahead, 46 to 36 on our weighted score, and it is the cheaper option too.
- Our pick
Moonshot AIKimi K3.1 Pro
46/100- ECI—
- Price$2.00 / $10.00
- Context1.05M
Fireworks AIEmber-1
36/100- ECI—
- Price$3.00 / $15.00
- Context1.05M
Add a model
Make it a three-way comparison.
Kimi K3.1 Pro is our pick
Kimi K3.1 Pro is the better all-round choice, scoring 46/100 against Ember-1 (36). It leads on price and 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 priceKimi K3.1 ProKimi K3.1 Pro $4.00 · Ember-1 $6.00 per 1M tokens (3:1 blend)
- Longest contextAbout the sameKimi K3.1 Pro 1,048,576 · Ember-1 1,048,576 tokens
- Widest inputsKimi K3.1 ProKimi K3.1 Pro: Text, Images, Video · Ember-1: Text, Images
- Self-hostingNo open weightsBoth are available only through APIs
| Measure | Weight | Kimi K3.1 Pro | Ember-1 |
|---|---|---|---|
| Price | 50% | 20 | 12 |
| Inputs & features | 30% | 80 | 60 |
| Context window | 20% | 61 | 61 |
| Overall | 100% | 46/100 | 36/100 |
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 | Kimi K3.1 ProMoonshot AI | Ember-1Fireworks AI |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | $2.00 (best) | $3.00 |
| Output | $10.00 (best) | $15.00 |
| Cached input | $0.20 | — |
| Blended (3:1) | $4.00 (best) | $6.00 |
| Long-context rate | Same rate | Same rate |
| Price source | Official Moonshot AI API | Median of 7 providers |
| Limits | ||
| Context window | 1,048,576 tokens | 1,048,576 tokens |
| Max output | 131,072 tokens | 131,072 tokens |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | Yes | Yes |
| PDFs | No | No |
| Audio | No | No |
| Video | Yes | No |
| Reasoning | Yeslow · high · max | Yes |
| Tool calling | Yes | Yes |
| Structured output | Yes | No |
| Availability | ||
| Weights | Proprietary | Proprietary |
| API model ID | kimi-k3.1-pro | — |
| API providers | 17 (best) | 7 |
| Released | Oct 23, 2026 | Sep 22, 2026 |
| Knowledge cutoff | — | — |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Kimi K3.1 Pro$40.00
- Ember-1$60.00
Which should you choose?
Which is better: Kimi K3.1 Pro or Ember-1?
Kimi K3.1 Pro is the better all-round choice, scoring 46/100 against Ember-1 (36). It leads on price and 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, Kimi K3.1 Pro or Ember-1?
Kimi K3.1 Pro is cheaper at $2.00 input / $10.00 output per million tokens (official Moonshot AI API price). Ember-1 costs $3.00 input / $15.00 output per million tokens (median across 7 API providers). At a typical mix of three input tokens to one output token, that is $4.00 per million tokens for Kimi K3.1 Pro versus $6.00 for Ember-1 (1.5× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. Kimi K3.1 Pro has not been scored yet and Ember-1 has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Kimi K3.1 Pro and Ember-1 yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Both support tool calling for agent workflows.
Which has the bigger context window?
Kimi K3.1 Pro and Ember-1 share the same 1,048,576-token context window. Maximum output per response: Kimi K3.1 Pro up to 131,072, Ember-1 up to 131,072 tokens.
Which can read images, PDFs, audio or video?
Kimi K3.1 Pro accepts text, images and video; Ember-1 accepts text and images. Kimi K3.1 Pro handles the widest range of inputs.
Are any of these open source?
No. Kimi K3.1 Pro and Ember-1 are proprietary and only available through APIs and apps.
Which is newer?
Kimi K3.1 Pro is the newest, released Oct 23, 2026. Ember-1 came out Sep 22, 2026.
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.
