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Claude 3.5 Haiku 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

Claude 3.5 Haiku specs · Sonar Pro specs
Verdict by category
  • PriceClaude 3.5 Haiku

    Claude 3.5 Haiku is roughly 3.8× cheaper on output tokens ($4.00 vs $15.00 per 1M).

  • Context windowTie

    Both ship a 200K-token context window.

  • BenchmarksTie

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

  • ModalitiesClaude 3.5 Haiku

    Claude 3.5 Haiku supports 2 modalities (text, vision) vs 1 for Sonar Pro.

  • OpennessTie

    Both are closed-weight, API-only.

On balance Claude 3.5 Haiku edges ahead, winning 2 of 5 categories against Sonar Pro's 0. Claude 3.5 Haiku is roughly 3.8× cheaper on output tokens ($4.00 vs $15.00 per 1M). Both ship a 200K-token context window.

No directly comparable public benchmarks are available for both models, check the spec sheets for individual scores. They differ in modality coverage, Claude 3.5 Haiku handles text, vision while Sonar Pro handles text, which can be the deciding factor before you even look at benchmarks. Both are closed-weight, API-only.

Sonar Pro is the newer of the two, released 3 months after Claude 3.5 Haiku, which usually means a more recent knowledge cutoff and updated safety post-training. Claude 3.5 Haiku is usually picked for customer support and code completion 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

SpecClaude 3.5 HaikuSonar Pro
ProviderAnthropicPerplexity
ReleasedNov 2024Jan 2025
Modalitiestext, visiontext
Context window200K tokens200K tokens
Max output,,
Input · 1M$0.80 / 1M tokens$3.00 / 1M tokens
Output · 1M$4.00 / 1M tokens$15.00 / 1M tokens
Knowledge cutoff,,
Open weightsNoNo
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$8.40 vs $31.50
  • Heavy usage, 1M in / 500k out per day$84.00 vs $315
  • RAG workload, 5M in / 200k out per day$144 vs $540

Light usage, 100k in / 50k out per day: $8.40 vs $31.50 per month, model A comes out ahead. Heavy usage, 1M in / 500k out per day: $84.00 vs $315 per month, model A comes out ahead. RAG workload, 5M in / 200k out per day: $144 vs $540 per month, model A comes out ahead.

Price calculator

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

  • Claude 3.5 Haiku$0.280
  • 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 Claude 3.5 Haiku if

Claude 3.5 Haiku fits when…

  • Fast
  • Cheap for Anthropic
  • Strong code at small size
  • Cost-sensitive workloads, 3.8× cheaper than Sonar Pro on output tokens.
  • Multimodal needs covering vision.
Pick Sonar Pro if

Sonar Pro fits when…

  • Multi-step web search
  • Deep research output
  • Citations
Don't want either?

Consider Claude Opus 4.7

Anthropic's mid-2026 flagship, ahead on SWE-bench, agent reliability, and writing quality.

See Claude Opus 4.7 specsClaude 3.5 Haiku vs Claude Opus 4.7Sonar Pro vs Claude Opus 4.7

Frequently asked

  • Is Claude 3.5 Haiku or Sonar Pro cheaper?
    Claude 3.5 Haiku is cheaper at $4.00 / 1M tokens per million output tokens, vs $15.00 / 1M tokens for Sonar Pro.
  • Which has the larger context window?
    Both Claude 3.5 Haiku and Sonar Pro ship a 200K-token context window.
  • Is Claude 3.5 Haiku or Sonar Pro better for coding?
    Both Claude 3.5 Haiku 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?
    Neither model ships open weights, both are accessible only via their respective providers' APIs.
  • When were Claude 3.5 Haiku and Sonar Pro released?
    Claude 3.5 Haiku was released by Anthropic on 2024-11-04. Sonar Pro was released by Perplexity on 2025-01-21.
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