Command A Plus vs Ember-1 vs Aion-3.0
Too close to call on our weighted score (Ember-1 36, Command A Plus 35, Aion-3.0 26). The right pick depends on what you value most.
CohereCommand A Plus
35/100- ECI—
- Price$2.50 / $10.00
- Context128K
Fireworks AIEmber-1
36/100- ECI—
- Price$3.00 / $15.00
- Context1.05M
Aion Labs
Aion-3.0
26/100- ECI—
- Price$3.00 / $6.00
- Context131K
Too close to call
It is close. Our weighted score puts them within 1 points (Ember-1 36/100, Command A Plus 35/100, Aion-3.0 26/100), so choose by what matters most for your work: Aion-3.0 on price and Ember-1 for long inputs. 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 priceAion-3.0Aion-3.0 $3.75 · Command A Plus $4.38 · Ember-1 $6.00 per 1M tokens (3:1 blend)
- Longest contextEmber-1Ember-1 1,048,576 · Aion-3.0 131,072 · Command A Plus 128,000 tokens
- Widest inputsCommand A Plus and Ember-1Command A Plus: Text, Images · Ember-1: Text, Images · Aion-3.0: Text
- Self-hostingCommand A PlusPublishes downloadable weights
| Measure | Weight | Command A Plus | Ember-1 | Aion-3.0 |
|---|---|---|---|---|
| Price | 50% | 19 | 12 | 22 |
| Inputs & features | 30% | 70 | 60 | 35 |
| Context window | 20% | 24 | 61 | 25 |
| Overall | 100% | 35/100 | 36/100 | 26/100 |
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 | Command A PlusCohere | Ember-1Fireworks AI | Aion-3.0Aion Labs |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | — | — | — |
| ECI rank | — | — | — |
| Price per million tokens | |||
| Input | $2.50 (best) | $3.00 | $3.00 |
| Output | $10.00 | $15.00 | $6.00 (best) |
| Cached input | — | — | — |
| Blended (3:1) | $4.38 | $6.00 | $3.75 (best) |
| Long-context rate | Same rate | Same rate | Same rate |
| Price source | Official Cohere API | Median of 7 providers | Median of 4 providers |
| Limits | |||
| Context window | 128,000 tokens | 1,048,576 tokens (best) | 131,072 tokens |
| Max output | 64,000 tokens | 131,072 tokens (best) | 32,768 tokens |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | Yes | No |
| PDFs | No | No | No |
| Audio | No | No | No |
| Video | No | No | No |
| Reasoning | Yes | Yes | Yes |
| Tool calling | Yes | Yes | Yes |
| Structured output | Yes | No | No |
| Availability | |||
| Weights | Open | Proprietary | Proprietary |
| API model ID | command-a-plus-05-2026 | — | — |
| API providers | 3 | 7 (best) | 4 |
| Released | May 20, 2026 | Sep 22, 2026 | May 5, 2026 |
| Knowledge cutoff | Apr 1, 2025 | — | — |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Command A Plus$45.00
- Ember-1$60.00
- Aion-3.0$42.00
Which should you choose?
Which is better: Command A Plus, Ember-1 or Aion-3.0?
It is close. Our weighted score puts them within 1 points (Ember-1 36/100, Command A Plus 35/100, Aion-3.0 26/100), so choose by what matters most for your work: Aion-3.0 on price and Ember-1 for long inputs. 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, Command A Plus, Ember-1 or Aion-3.0?
Aion-3.0 is cheaper at $3.00 input / $6.00 output per million tokens (median across 4 API providers). Command A Plus costs $2.50 input / $10.00 output per million tokens (official Cohere 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 $3.75 per million tokens for Aion-3.0 versus $4.38 for Command A Plus (1.2× as much) and $6.00 for Ember-1 (1.6× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers all three models yet. Command A Plus has not been scored yet, Ember-1 has not been scored yet and Aion-3.0 has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Command A Plus, Ember-1 and Aion-3.0 yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. All three support tool calling for agent workflows.
Which has the bigger context window?
Ember-1 has the largest context window at 1,048,576 tokens, against 131,072 for Aion-3.0 and 128,000 for Command A Plus. Maximum output per response: Command A Plus up to 64,000, Ember-1 up to 131,072, Aion-3.0 up to 32,768 tokens.
Which can read images, PDFs, audio or video?
Command A Plus accepts text and images; Ember-1 accepts text and images; Aion-3.0 accepts text. Command A Plus handles the widest range of inputs.
Are any of these open source?
Command A Plus publishes its weights and can be self-hosted; Ember-1 and Aion-3.0 is proprietary.
Which is newer?
Ember-1 is the newest, released Sep 22, 2026. Command A Plus came out May 20, 2026; Aion-3.0 came out May 5, 2026. Knowledge cutoff: Command A Plus Apr 1, 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.
