GPT-5.3 Codex Spark vs MiMo-V2.6-Pro-UltraSpeed vs Command A Plus
MiMo-V2.6-Pro-UltraSpeed comes out ahead, 44 to 38 and 35 on our weighted score, though Command A Plus is 20% cheaper per token.
OpenAIGPT-5.3 Codex Spark
38/100- ECI—
- Price$1.75 / $14.00
- Context128K
- Our pick
XiaomiMiMo-V2.6-Pro-UltraSpeed
44/100- ECI—
- Price$4.35 / $8.70
- Context1.05M
CohereCommand A Plus
35/100- ECI—
- Price$2.50 / $10.00
- Context128K
MiMo-V2.6-Pro-UltraSpeed is our pick
MiMo-V2.6-Pro-UltraSpeed is the better all-round choice, scoring 44/100 against GPT-5.3 Codex Spark (38) and Command A Plus (35). It leads on context window. Command A Plus wins on price. 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 priceCommand A PlusCommand A Plus $4.38 · GPT-5.3 Codex Spark $4.81 · MiMo-V2.6-Pro-UltraSpeed $5.44 per 1M tokens (3:1 blend)
- Longest contextMiMo-V2.6-Pro-UltraSpeedMiMo-V2.6-Pro-UltraSpeed 1,048,576 · GPT-5.3 Codex Spark 128,000 · Command A Plus 128,000 tokens
- Widest inputsMiMo-V2.6-Pro-UltraSpeedGPT-5.3 Codex Spark: Text, Images, PDFs · MiMo-V2.6-Pro-UltraSpeed: Text, Images, Audio, Video · Command A Plus: Text, Images
- Self-hostingMiMo-V2.6-Pro-UltraSpeed and Command A PlusPublishes downloadable weights
| Measure | Weight | GPT-5.3 Codex Spark | MiMo-V2.6-Pro-UltraSpeed | Command A Plus |
|---|---|---|---|---|
| Price | 50% | 18 | 15 | 19 |
| Inputs & features | 30% | 80 | 80 | 70 |
| Context window | 20% | 24 | 61 | 24 |
| Overall | 100% | 38/100 | 44/100 | 35/100 |
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 | GPT-5.3 Codex SparkOpenAI | MiMo-V2.6-Pro-UltraSpeedXiaomi | Command A PlusCohere |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | — | — | — |
| ECI rank | — | — | — |
| Price per million tokens | |||
| Input | $1.75 (best) | $4.35 | $2.50 |
| Output | $14.00 | $8.70 (best) | $10.00 |
| Cached input | $0.175 | $0.036 (best) | — |
| Blended (3:1) | $4.81 | $5.44 | $4.38 (best) |
| Long-context rate | Same rate | Same rate | Same rate |
| Price source | Official OpenAI API | Official Xiaomi API | Official Cohere API |
| Limits | |||
| Context window | 128,000 tokens | 1,048,576 tokens (best) | 128,000 tokens |
| Max output | 32,000 tokens | 131,072 tokens (best) | 64,000 tokens |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | Yes | Yes |
| PDFs | Yes | No | No |
| Audio | No | Yes | No |
| Video | No | Yes | No |
| Reasoning | Yeslow · medium · high · xhigh | Yes | Yes |
| Tool calling | Yes | Yes | Yes |
| Structured output | Yes | No | Yes |
| Availability | |||
| Weights | Proprietary | Open | Open |
| API model ID | gpt-5.3-codex-spark | mimo-v2.6-pro-ultraspeed | command-a-plus-05-2026 |
| API providers | 1 | 9 (best) | 1 |
| Released | Feb 5, 2026 | Sep 21, 2026 | May 20, 2026 |
| Knowledge cutoff | Aug 31, 2025 | — | 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.
- GPT-5.3 Codex Spark$45.50
- MiMo-V2.6-Pro-UltraSpeed$60.90
- Command A Plus$45.00
Which should you choose?
Which is better: GPT-5.3 Codex Spark, MiMo-V2.6-Pro-UltraSpeed or Command A Plus?
MiMo-V2.6-Pro-UltraSpeed is the better all-round choice, scoring 44/100 against GPT-5.3 Codex Spark (38) and Command A Plus (35). It leads on context window. Command A Plus wins on price. 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, GPT-5.3 Codex Spark, MiMo-V2.6-Pro-UltraSpeed or Command A Plus?
Command A Plus is cheaper at $2.50 input / $10.00 output per million tokens (official Cohere API price). GPT-5.3 Codex Spark costs $1.75 input / $14.00 output per million tokens (official OpenAI API price); MiMo-V2.6-Pro-UltraSpeed costs $4.35 input / $8.70 output per million tokens (official Xiaomi API price). At a typical mix of three input tokens to one output token, that is $4.38 per million tokens for Command A Plus versus $4.81 for GPT-5.3 Codex Spark (1.1× as much) and $5.44 for MiMo-V2.6-Pro-UltraSpeed (1.2× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers all three models yet. GPT-5.3 Codex Spark has not been scored yet, MiMo-V2.6-Pro-UltraSpeed has not been scored yet and Command A Plus has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for GPT-5.3 Codex Spark, MiMo-V2.6-Pro-UltraSpeed and Command A Plus 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?
MiMo-V2.6-Pro-UltraSpeed has the largest context window at 1,048,576 tokens, against 128,000 for GPT-5.3 Codex Spark and 128,000 for Command A Plus. Maximum output per response: GPT-5.3 Codex Spark up to 32,000, MiMo-V2.6-Pro-UltraSpeed up to 131,072, Command A Plus up to 64,000 tokens.
Which can read images, PDFs, audio or video?
GPT-5.3 Codex Spark accepts text, images and PDFs; MiMo-V2.6-Pro-UltraSpeed accepts text, images, audio and video; Command A Plus accepts text and images. MiMo-V2.6-Pro-UltraSpeed handles the widest range of inputs.
Are any of these open source?
MiMo-V2.6-Pro-UltraSpeed and Command A Plus publishes its weights and can be self-hosted; GPT-5.3 Codex Spark is proprietary.
Which is newer?
MiMo-V2.6-Pro-UltraSpeed is the newest, released Sep 21, 2026. Command A Plus came out May 20, 2026; GPT-5.3 Codex Spark came out Feb 5, 2026. Knowledge cutoff: GPT-5.3 Codex Spark Aug 31, 2025, 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 Oct 4, 2026.
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