Kimi K3 vs Sonar Reasoning Pro
At a Glance
| Compare |  Kimi K3Moonshot AI |  Sonar Reasoning ProPerplexity |
|---|---|---|
| Intelligence, Cost, and Efficiency | ||
| IntelligenceHigher is better · MM Intelligence v2.5 | #17 of 4670.3 score · 3/3 sources · complete | UnrankedNot in the 46-model eligible cohort |
| CostLower is better · Published-token output estimate | #30 of 44$0.194 per LiveBench case | UnrankedNot in the 44-model eligible cohort |
| EfficiencyHigher is better · MM Efficiency v1.5 | #21 of 3852.5 score · 3/3 sources · complete | UnrankedNot in the 38-model eligible cohort |
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | $2.85Deepinfra ↗ · Sep 22, 2026 | $2.00Openrouter ↗ · Sep 22, 2026 |
| Output priceFrom · USD / 1M tokens | $14.25Deepinfra ↗ · Sep 22, 2026 | $8.00Openrouter ↗ · Sep 22, 2026 |
| Context windowMaximum documented tokens | 1,049K | 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 | Kimi-K3 | Sonar Reasoning Pro |
|---|---|---|
| Developer | Moonshot AI | Perplexity |
| Family | Kimi K3 | Sonar |
| Model | Kimi-K3 | Sonar Reasoning Pro |
| Version | Kimi-K3 | Sonar Reasoning Pro |
| Lifecycle | active | active |
| Released | 2026-07-16 | Unknown |
| Knowledge cutoff | Unknown | Unknown |
| Input modalities | Text, Image | Text |
| Output modalities | Text | Text |
| Context window | 1,049K | 128K |
| Total parameters | 2.8T | Unknown |
| Active parameters | 104B | Unknown |
| License | other | Unknown |
| Open weights | Yes | No |
| API available | Yes | Yes |
| Self-hostable | Yes | No |
| Provider access | Deepinfra (Standard), Fireworks Ai (Standard), Hugging Face (Standard), Openrouter (Standard), Together Ai (Standard) | Openrouter (Standard), Perplexity (Standard) |
| Capabilities | chat, generation, reasoning | chat, citations, reasoning, search |
Kimi K3 Capabilities
Sonar Reasoning Pro Capabilities
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Primary Evidence
Sources and Freshness
Questions
Kimi K3 vs Sonar Reasoning Pro FAQs
Is Kimi K3 or Sonar Reasoning Pro better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Kimi K3 and Sonar Reasoning Pro, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Kimi K3 or Sonar Reasoning Pro?+
Kimi K3 is $2.85 and Sonar Reasoning Pro is $2.00 per million tokens, so Sonar Reasoning Pro is cheaper on this metric. Kimi K3 is $14.25 and Sonar Reasoning Pro is $8.00 per million tokens, so Sonar Reasoning Pro is cheaper on this metric.
Which has a larger context window, Kimi K3 or Sonar Reasoning Pro?+
Kimi K3 has the larger sourced context window. Kimi K3 supports 1,049K and Sonar Reasoning Pro supports 128K.
Which performs better in benchmarks, Kimi K3 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 Kimi K3 or Sonar Reasoning Pro be self-hosted?+
Kimi K3 is the only model in this pair currently marked as self-hostable. Kimi K3 is open weight; Sonar Reasoning Pro is not marked open weight.
Can Kimi K3 and Sonar Reasoning Pro understand images?+
Kimi K3 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, Kimi K3 or Sonar Reasoning Pro?+
Neither has a larger sourced maximum output. Kimi K3 is — and Sonar Reasoning Pro is —.
Do Kimi K3 and Sonar Reasoning Pro support reasoning and tool use?+
Kimi K3: reasoning and image input. Sonar Reasoning Pro: reasoning. Feature support does not establish relative quality.
Which is available from more inference providers, Kimi K3 or Sonar Reasoning Pro?+
Kimi K3 has 5 sourced provider routes; Sonar Reasoning Pro has 2, so Kimi K3 has broader tracked availability.
Which offers better value, Kimi K3 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.