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Aya Expanse 8B vs Sonar Pro

A complete head-to-head: pricing, context window, benchmarks, modality coverage, and openness, with a programmatic verdict synthesized from the underlying data.

Updated

Aya Expanse 8B specs · Sonar Pro specs
Verdict by category
  • PriceSonar Pro

    Sonar Pro publishes pricing ($15.00 / 1M output tokens) while Aya Expanse 8B does not.

  • Context windowSonar Pro

    Sonar Pro accepts 200K tokens vs 8.2K, 24.4× the room for long documents and codebases.

  • BenchmarksTie

    No directly comparable public benchmarks are available for both models, check the spec sheets for individual scores.

  • ModalitiesTie

    Both handle text.

  • OpennessAya Expanse 8B

    Aya Expanse 8B ships open weights (CC-BY-NC 4.0); Sonar Pro is API-only.

On balance Sonar Pro edges ahead, winning 2 of 5 categories against Aya Expanse 8B's 1. Sonar Pro publishes pricing ($15.00 / 1M output tokens) while Aya Expanse 8B does not. Sonar Pro accepts 200K tokens vs 8.2K, 24.4× the room for long documents and codebases.

No directly comparable public benchmarks are available for both models, check the spec sheets for individual scores. Both target the same set of modalities (text), so the deciding factors are price, context, and raw quality. Aya Expanse 8B ships open weights (CC-BY-NC 4.0); Sonar Pro is API-only.

Sonar Pro is the newer of the two, released 3 months after Aya Expanse 8B, which usually means a more recent knowledge cutoff and updated safety post-training. Aya Expanse 8B is usually picked for multilingual and translation workloads, while Sonar Pro sees more deployments in research agent and rag. If pricing matters more than every last benchmark point, run the numbers in the calculator below before committing.

Side-by-side specs

SpecAya Expanse 8BSonar Pro
ProviderCoherePerplexity
ReleasedOct 2024Jan 2025
Modalitiestexttext
Context window8.2K tokens200K tokens
Max output,,
Input · 1MPricing not published$3.00 / 1M tokens
Output · 1MPricing not published$15.00 / 1M tokens
Knowledge cutoff,,
Open weightsYes (CC-BY-NC 4.0)No
API availableYesYes

Pricing at scale

What you'd actually pay at typical workloads. Numbers come from each model's published per-million-token rates.

  • Light usage, 100k in / 50k out per day, vs $31.50
  • Heavy usage, 1M in / 500k out per day, vs $315
  • RAG workload, 5M in / 200k out per day, vs $540

Light usage, 100k in / 50k out per day: pricing not directly comparable (one or both models are missing public per-token rates). Heavy usage, 1M in / 500k out per day: pricing not directly comparable (one or both models are missing public per-token rates). RAG workload, 5M in / 200k out per day: pricing not directly comparable (one or both models are missing public per-token rates).

Price calculator

Estimated spend for the listed models at your usage. Numbers are derived from each model's published per-million-token rates.

  • Aya Expanse 8BPricing unavailable
  • Sonar Pro$1.05

Benchmarks compared

Only sourced numbers. Where a benchmark is missing for one model we show the available value rather than fabricating the other.

Benchmark scores not yet available. We only publish numbers we can source from official model cards or independent leaderboards, see methodology.
Pick Aya Expanse 8B if

Aya Expanse 8B fits when…

  • Multilingual at small size
  • Strong cross-lingual transfer
  • Efficient on commodity GPUs
  • Self-hosting and on-prem requirements, open weights (CC-BY-NC 4.0).
Pick Sonar Pro if

Sonar Pro fits when…

  • Multi-step web search
  • Deep research output
  • Citations
  • Long-context tasks, handles 200K tokens vs 8.2K for Aya Expanse 8B.
Don't want either?

Consider Command R+ (08-2024)

Cohere's flagship optimized for RAG and tool use in enterprise settings.

See Command R+ (08-2024) specsAya Expanse 8B vs Command R+ (08-2024)Sonar Pro vs Command R+ (08-2024)

Frequently asked

  • Is Aya Expanse 8B or Sonar Pro cheaper?
    Per-token pricing isn't published for at least one of these models, check each model's spec page for current rates.
  • Which has the larger context window?
    Sonar Pro accepts 200K tokens vs 8.2K for Aya Expanse 8B.
  • Is Aya Expanse 8B or Sonar Pro better for coding?
    Both Aya Expanse 8B and Sonar Pro are competitive on coding benchmarks. See each model's individual spec page for HumanEval and SWE-bench scores where published. For an opinionated pick, consult our Best LLM for Coding ranking.
  • Are either of these models open source?
    Aya Expanse 8B ships open weights (CC-BY-NC 4.0). Sonar Pro is API-only.
  • When were Aya Expanse 8B and Sonar Pro released?
    Aya Expanse 8B was released by Cohere on 2024-10-23. Sonar Pro was released by Perplexity on 2025-01-21.
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