Sonar Pro vs Grok 4.5
Benchmark Performance
Available Benchmarks
| Benchmark | Sonar Pro | Grok 4.5 |
|---|---|---|
| LMArena Search Arenasearch-2026-08-24-011508720696 · arena_rating · leader | 1,130.2193% of row best · rating · ppl-sonar-pro-high; 95% CI [1124.48384666, 1135.92956299]; votes 28519; rank 31 | 1,212.65100% of row best · rating · grok-4.5; 95% CI [1205.78347274, 1219.50889748]; votes 31505; rank 8 |
| Overall ResultCounted from the protocol-matched rows above | 0 benchmark wins | 1 benchmark winOverall lead |
Third-party benchmark Only like-for-like primary-publisher results are shown; raw scores, relative scores, configuration, and token spend remain visible.
Technical Differences
Side-by-Side Facts
| Field | Sonar Pro | Grok 4.5 |
|---|---|---|
| Developer | Perplexity | xAI |
| Family | Sonar | Grok 4 |
| Model | Sonar Pro | Grok 4.5 |
| Version | Sonar Pro | Grok 4.5 |
| Lifecycle | active | active |
| Released | Unknown | 2026-07-16 |
| Knowledge cutoff | Unknown | Unknown |
| Input modalities | Text | Text, Image |
| Output modalities | Text | Text |
| Context window | 200K | 500K |
| 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 | Openrouter (Standard), Perplexity (Standard) | Xai (Standard) |
| Capabilities | chat, citations, search | chat, generation, reasoning, structured_outputs, tools |
13 comparable fields · 8 material differences · Pair passes the primary-source comparison gate
Sonar Pro Capabilities
Grok 4.5 Capabilities
Internal Comparison Graph
Related Comparisons
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|---|---|---|---|
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Primary Evidence
Sources and Freshness
Questions
Sonar Pro vs Grok 4.5 FAQs
Is Sonar Pro or Grok 4.5 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Sonar Pro and Grok 4.5, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Sonar Pro or Grok 4.5?+
Sonar Pro is $3.00 and Grok 4.5 is $2.00 per million tokens, so Grok 4.5 is cheaper on this metric. Sonar Pro is $15.00 and Grok 4.5 is $6.00 per million tokens, so Grok 4.5 is cheaper on this metric.
Which has a larger context window, Sonar Pro or Grok 4.5?+
Grok 4.5 has the larger sourced context window. Sonar Pro supports 200K and Grok 4.5 supports 500K.
Which performs better in benchmarks, Sonar Pro or Grok 4.5?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can Sonar Pro or Grok 4.5 be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. Sonar Pro is not marked open weight; Grok 4.5 is not marked open weight.
Can Sonar Pro and Grok 4.5 understand images?+
Sonar Pro is not documented with image input; Grok 4.5 is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Sonar Pro or Grok 4.5?+
Neither has a larger sourced maximum output. Sonar Pro is — and Grok 4.5 is —.
Do Sonar Pro and Grok 4.5 support reasoning and tool use?+
Sonar Pro: none of these features are definitively sourced. Grok 4.5: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, Sonar Pro or Grok 4.5?+
Sonar Pro has 2 sourced provider routes; Grok 4.5 has 1, so Sonar Pro has broader tracked availability.
Which offers better value, Sonar Pro or Grok 4.5?+
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.