Claude Haiku 4 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 Haiku 4 specs · Sonar Pro specs- PriceSonar Pro
Sonar Pro publishes pricing ($15.00 / 1M output tokens) while Claude Haiku 4 does not.
- 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 Haiku 4
Claude Haiku 4 supports 2 modalities (text, vision) vs 1 for Sonar Pro.
- OpennessTie
Both are closed-weight, API-only.
It's a genuine coin-flip between Claude Haiku 4 and Sonar Pro: 1 category wins each, with the rest tied. Sonar Pro publishes pricing ($15.00 / 1M output tokens) while Claude Haiku 4 does not. 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 Haiku 4 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.
Claude Haiku 4 is the newer of the two, released 8 months after Sonar Pro, which usually means a more recent knowledge cutoff and updated safety post-training. Claude Haiku 4 is usually picked for summarization and customer support 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
| Spec | Claude Haiku 4 | Sonar Pro |
|---|---|---|
| Provider | Anthropic | Perplexity |
| Released | Oct 2025 | Jan 2025 |
| Modalities | text, vision | text |
| Context window | 200K tokens | 200K tokens |
| Max output | , | , |
| Input · 1M | Pricing not published | $3.00 / 1M tokens |
| Output · 1M | Pricing not published | $15.00 / 1M tokens |
| Knowledge cutoff | , | , |
| Open weights | No | No |
| API available | Yes | Yes |
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).
Estimated spend for the listed models at your usage. Numbers are derived from each model's published per-million-token rates.
- Claude Haiku 4Pricing 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.
Claude Haiku 4 fits when…
- Fast and cheap for an Anthropic model
- Inherits Claude's sensible defaults
- Vision support included
- Multimodal needs covering vision.
Sonar Pro fits when…
- Multi-step web search
- Deep research output
- Citations
Consider Claude Opus 4.7
Anthropic's mid-2026 flagship, ahead on SWE-bench, agent reliability, and writing quality.
Frequently asked
Is Claude Haiku 4 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?
Both Claude Haiku 4 and Sonar Pro ship a 200K-token context window.Is Claude Haiku 4 or Sonar Pro better for coding?
Both Claude Haiku 4 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 Haiku 4 and Sonar Pro released?
Claude Haiku 4 was released by Anthropic on 2025-10-01. Sonar Pro was released by Perplexity on 2025-01-21.
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