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Comparison · 2 models · Updated Oct 4, 2026

GPT-5.3 Codex Spark vs Command A Plus

Too close to call on our weighted score (GPT-5.3 Codex Spark 38, Command A Plus 35). The right pick depends on what you value most.

  1. OpenAI

    GPT-5.3 Codex Spark

    Released Feb 5, 2026

    38/100
    • ECI—
    • Price$1.75 / $14.00
    • Context128K
    Full specs Remove GPT-5.3 Codex Spark

  2. Cohere

    Command A Plus

    Released May 20, 2026

    35/100
    • ECI—
    • Price$2.50 / $10.00
    • Context128K
    Full specs Remove Command A Plus

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    Make it a three-way comparison.

01 — Verdict

Too close to call

It is close. Our weighted score puts them within 2 points (GPT-5.3 Codex Spark 38/100, Command A Plus 35/100), so choose by what matters most for your work: Command A Plus 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 per 1M tokens (3:1 blend)
  • Longest contextAbout the sameGPT-5.3 Codex Spark 128,000 · Command A Plus 128,000 tokens
  • Widest inputsGPT-5.3 Codex SparkGPT-5.3 Codex Spark: Text, Images, PDFs · Command A Plus: Text, Images
  • Self-hostingCommand A PlusPublishes downloadable weights
How the score is built
MeasureWeightGPT-5.3 Codex SparkCommand A Plus
Price50%1819
Inputs & features30%8070
Context window20%2424
Overall100%38/10035/100

Left out because at least one model lacks the data: capability. The remaining weights were rescaled.

02 — Side by side

Every spec in one table

Highlighted cells lead their row. Dashes mean the data is not published.

GPT-5.3 Codex Spark vs Command A Plus specifications side by side
SpecificationGPT-5.3 Codex SparkOpenAICommand A PlusCohere
Capability
Capabilities Index (ECI)——
ECI rank——
Price per million tokens
Input$1.75 (best)$2.50
Output$14.00$10.00 (best)
Cached input$0.175—
Blended (3:1)$4.81$4.38 (best)
Long-context rateSame rateSame rate
Price sourceOfficial OpenAI APIOfficial Cohere API
Limits
Context window128,000 tokens128,000 tokens
Max output32,000 tokens64,000 tokens (best)
Inputs and features
TextYesYes
ImagesYesYes
PDFsYesNo
AudioNoNo
VideoNoNo
ReasoningYeslow · medium · high · xhighYes
Tool callingYesYes
Structured outputYesYes
Availability
WeightsProprietaryOpen
API model IDgpt-5.3-codex-sparkcommand-a-plus-05-2026
API providers11
ReleasedFeb 5, 2026May 20, 2026
Knowledge cutoffAug 31, 2025Apr 1, 2025
03 — Cost

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
  • Command A Plus$45.00
04 — Questions

Which should you choose?

Which is better: GPT-5.3 Codex Spark or Command A Plus?

It is close. Our weighted score puts them within 2 points (GPT-5.3 Codex Spark 38/100, Command A Plus 35/100), so choose by what matters most for your work: Command A Plus 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 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). 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).

Which scores higher on benchmarks?

There is no independent benchmark that covers both models yet. GPT-5.3 Codex Spark 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 and Command A Plus 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?

GPT-5.3 Codex Spark and Command A Plus share the same 128,000-token context window. Maximum output per response: GPT-5.3 Codex Spark up to 32,000, 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; Command A Plus accepts text and images. GPT-5.3 Codex Spark handles the widest range of inputs.

Are any of these open source?

Command A Plus publishes its weights and can be self-hosted; GPT-5.3 Codex Spark is proprietary.

Which is newer?

Command A Plus is the newest, released 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.

05 — Keep comparing

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