Claude Haiku 4.5 vs Sonar Reasoning Pro
At a Glance
| Compare | Claude Haiku 4.5Anthropic |  Sonar Reasoning ProPerplexity |
|---|---|---|
| Intelligence, Cost, and Efficiency | ||
| IntelligenceHigher is better · MM Intelligence v2.5 | #43 of 469.0 score · 2/3 sources · provisional · missing LiveBench · full-core range 6.0–39.3 | UnrankedNot in the 46-model eligible cohort |
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | $1.00Anthropic ↗ · Sep 3, 2026 | $2.00Openrouter ↗ · Sep 22, 2026 |
| Output priceFrom · USD / 1M tokens | $5.00Anthropic ↗ · Sep 3, 2026 | $8.00Openrouter ↗ · Sep 22, 2026 |
| Context windowMaximum documented tokens | 200K | 128K |
| Model facts checked | Aug 28, 2026View model evidence → | Aug 29, 2026View model evidence → |
Token prices are the lowest available sourced USD rates; input and output may use different providers. Cost ranking estimates output spend on LiveBench, not a full request bill. Ranking methodology →
Available Benchmarks
Side-by-Side Facts
| Field | Claude Haiku 4.5 | Sonar Reasoning Pro |
|---|---|---|
| Developer | Anthropic | Perplexity |
| Family | Claude 4 5 | Sonar |
| Model | Claude Haiku 4.5 | Sonar Reasoning Pro |
| Version | Claude Haiku 4.5 | Sonar Reasoning Pro |
| Lifecycle | active | active |
| Released | 2025-10-15 | Unknown |
| Knowledge cutoff | Unknown | Unknown |
| Input modalities | Text, Image | Text |
| Output modalities | Text | Text |
| Context window | 200K | 128K |
| Total parameters | Unknown | Unknown |
| Active parameters | Unknown | Unknown |
| License | Unknown | Unknown |
| Open weights | No | No |
| API available | Yes | Yes |
| Self-hostable | No | No |
| Provider access | Anthropic (Standard), Deepinfra (Standard) | Openrouter (Standard), Perplexity (Standard) |
| Capabilities | chat, generation, reasoning, tools | chat, citations, reasoning, search |
Claude Haiku 4.5 Capabilities
Sonar Reasoning Pro Capabilities
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Primary Evidence
Sources and Freshness
Questions
Claude Haiku 4.5 vs Sonar Reasoning Pro FAQs
Is Claude Haiku 4.5 or Sonar Reasoning Pro better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Claude Haiku 4.5 and Sonar Reasoning Pro, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Claude Haiku 4.5 or Sonar Reasoning Pro?+
Claude Haiku 4.5 is $1.00 and Sonar Reasoning Pro is $2.00 per million tokens, so Claude Haiku 4.5 is cheaper on this metric. Claude Haiku 4.5 is $5.00 and Sonar Reasoning Pro is $8.00 per million tokens, so Claude Haiku 4.5 is cheaper on this metric.
Which has a larger context window, Claude Haiku 4.5 or Sonar Reasoning Pro?+
Claude Haiku 4.5 has the larger sourced context window. Claude Haiku 4.5 supports 200K and Sonar Reasoning Pro supports 128K.
Which performs better in benchmarks, Claude Haiku 4.5 or Sonar Reasoning Pro?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can Claude Haiku 4.5 or Sonar Reasoning Pro be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. Claude Haiku 4.5 is not marked open weight; Sonar Reasoning Pro is not marked open weight.
Can Claude Haiku 4.5 and Sonar Reasoning Pro understand images?+
Claude Haiku 4.5 is documented with image input; Sonar Reasoning Pro is not documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Claude Haiku 4.5 or Sonar Reasoning Pro?+
Neither has a larger sourced maximum output. Claude Haiku 4.5 is 64K and Sonar Reasoning Pro is —.
Do Claude Haiku 4.5 and Sonar Reasoning Pro support reasoning and tool use?+
Claude Haiku 4.5: reasoning, tool calling, and image input. Sonar Reasoning Pro: reasoning. Feature support does not establish relative quality.
Which is available from more inference providers, Claude Haiku 4.5 or Sonar Reasoning Pro?+
Claude Haiku 4.5 has 2 sourced provider routes; Sonar Reasoning Pro has 2, a tie.
Which offers better value, Claude Haiku 4.5 or Sonar Reasoning Pro?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.