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Model Comparison

Perceptron Mk1 vs Perceptron Mk1.5Which Is Better in 2026?

Perceptron•
Perceptron

Perceptron Mk1 vs Perceptron Mk1.5: which should you choose in 2026?

Perceptron Mk1 (by Perceptron) and Perceptron Mk1.5 (by Perceptron) are compared below. Here is how they stack up on benchmarks, price, and capabilities, and which one to pick in 2026.

There are not enough shared, protocol-compatible benchmark results to declare a performance leader.

Their blended API prices are effectively the same.

Perceptron Mk1.5 has the larger context window (36,864 tokens vs 32,768 tokens).

Choose Perceptron Mk1 if…

  • • your own prompt tests favor its output; shared comparable evidence does not identify a unique advantage

Choose Perceptron Mk1.5 if…

  • • you work with longer documents, transcripts, or codebases

The benchmark count includes only results measured with a matching benchmark version and protocol. Arena scores are shown separately. Missing, preliminary, and incompatible data is not treated as a controlled win. Published point-score comparisons are labeled separately when protocol details are incomplete. For text-output models, the verdict also compares token pricing and context windows.

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Performance benchmarks

Every value links to its source. A dash means that no reviewed result is available for that exact model and protocol.

Perceptron Mk1 and Perceptron Mk1.5 benchmark results
BenchmarkPerceptron Mk1Perceptron Mk1.5
AutomationBench-AA

A 657-task benchmark of multi-step work across simulated SaaS applications in six business domains. The Artificial Analysis protocol reports a guardrail-aware score and is distinct from both the public Zapier split and the unrelated dynamic AutoBench framework.

Guardrail-aware score

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BrowseComp

A benchmark of difficult, verifiable information-seeking questions designed to measure an agent's ability to locate hard-to-find facts through web browsing.

Accuracy

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OSWorld-Verified

A verified computer-use benchmark in which multimodal agents operate desktop applications and are graded from the resulting environment state.

Mean task reward

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SWE-Bench Verified

A human-validated subset of real GitHub issues used to measure whether a coding agent can produce repository patches that resolve the associated tests.

Resolved

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Terminal-Bench 2.1

Version 2.1 of the benchmark for completing realistic tasks in terminal environments. Harness, resource limits, and attempt count are part of the protocol.

Mean task success

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AutoBench

A dynamic LLM evaluation framework in which models generate questions, answer them, and participate in reciprocal peer assessment. AutoBench is distinct from Zapier's AutomationBench.

Weighted peer-assessment score

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GPQA Diamond

The highest-quality subset of Graduate-Level Google-Proof Q&A, designed to test expert-level scientific reasoning in biology, physics, and chemistry.

Accuracy

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Humanity's Last Exam

A 2,500-question expert-level benchmark spanning dozens of academic fields. Tool-assisted and no-tools results are separate protocols and must not be merged.

Accuracy

——

Benchmark sources

    Reviewed evidence last updated 2026-08-09.

    Pricing, capabilities, and model facts

    Perceptron Mk1 and Perceptron Mk1.5 model facts
    FeaturePerceptron Mk1Perceptron Mk1.5
    Context & model facts
    DeveloperPerceptronPerceptron
    API providerPerceptronPerceptron
    Input context32,768 tokens36,864 tokens
    Maximum output8,192 tokens8,192 tokens
    Released——
    Added to WritingmateMay 12, 2026Sep 25, 2026
    LicenseNot availableNot available
    Knowledge cutoff——
    Capabilities
    InputsText, Image, VideoText, Image, Video, Audio
    OutputsTextText
    Provider endpoint accepts tool parametersNoYes
    ReasoningYesYes
    VisionYesYes
    Image GenerationNoNo
    Video GenerationNoNo
    API pricing
    Input (per 1M tokens)$0.15$0.15
    Output (per 1M tokens)$1.50$1.50
    Blended 3:1 input/output$0.4875$0.4875
    API performance
    p95 latencyNot measuredNot measured
    Output throughputNot measuredNot measured
    Writingmate shows API performance only when both models have enough observations from the same measurement window, prompt profile, and provider. Third-party latency values are not copied into this table.

    Data sources

    • Writingmate model catalog (pricing, limits, and availability)

    Catalog data last updated Sep 25, 2026.

    Perceptron Mk1 vs Perceptron Mk1.5 FAQ

    Which is better, Perceptron Mk1 or Perceptron Mk1.5?

    There are not enough shared, protocol-compatible benchmark results to declare a performance leader. Their blended API prices are effectively the same. Perceptron Mk1.5 has the larger context window (36,864 tokens vs 32,768 tokens).

    Which model is cheaper to use through an API?

    Their blended API prices are effectively the same.

    Which model supports more context?

    Perceptron Mk1.5 has the larger context window (36,864 tokens vs 32,768 tokens).

    Can I switch between Perceptron Mk1 and Perceptron Mk1.5?

    Yes. Use the model selector on this page to open any current Writingmate model comparison. You can also run the same prompt with both models in Writingmate.