Model comparison
Claude Opus 5.5 vs Sonar Reasoning Pro
Claude Opus 5.5 has enough public results to be ranked (#3); Sonar Reasoning Pro does not yet, so treat this comparison as directional.
Last verified . 0 shared benchmarks.
PerplexitySummary
- Sonar Reasoning Pro is cheaper at $2 / $8 per million input/output tokens, against $4 / $20 for Claude Opus 5.5.
- Claude Opus 5.5 accepts more context: 1M tokens versus 128K.
Side by side
| Claude Opus 5.5 | Sonar Reasoning Pro | |
|---|---|---|
| Provider | Anthropic | Perplexity |
| Noometry Index | 68.5 | — |
| Released | 2026-09-22 | 2024-01-01 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | 128K |
| Max output | 128K | 4K |
| Input $ / M tokens | $4 | $2 |
| Output $ / M tokens | $20 | $8 |
| Results tracked | 35 | 1 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Not comparable
Claude Opus 5.5: 71.4 (#1), Sonar Reasoning Pro: —
| Benchmark | Claude Opus 5.5 | Sonar Reasoning Pro |
|---|---|---|
| FrontierCode | 54.4% | — |
| CursorBench | 57.8% | — |
| LMArena WebDev | 1820 | — |
| FrontierSWE | 62.3% | — |
| SciCode | 66.9% | — |
| LMArena Coding | 1545 | — |
| MirrorCode | 77.4% | — |
Agentic & Tool Use Not comparable
Claude Opus 5.5: 45.3 (#13), Sonar Reasoning Pro: —
| Benchmark | Claude Opus 5.5 | Sonar Reasoning Pro |
|---|---|---|
| APEX-Agents | 73.5% | — |
| GDP.pdf | 30.6% | — |
| LMArena Search | — | 1139 |
Reasoning Not comparable
Claude Opus 5.5: 79.5 (#2), Sonar Reasoning Pro: —
| Benchmark | Claude Opus 5.5 | Sonar Reasoning Pro |
|---|---|---|
| ARC-AGI-2 | 92.5% | — |
| NYT Connections (extended) | 88.5% | — |
| ARC-AGI-1 | 97.5% | — |
| CritPt | 31.7% | — |
| EBR-Bench | 71.4% | — |
| LMArena Hard Prompts | 1545 | — |
| Mystery Game Puzzles | 71% | — |
| DTBench | 98.9% | — |
| LMCA | 68.2% | — |
Math Not comparable
Claude Opus 5.5: 92.4 (#2), Sonar Reasoning Pro: —
| Benchmark | Claude Opus 5.5 | Sonar Reasoning Pro |
|---|---|---|
| FrontierMath (Tiers 1-3) | 91.2% | — |
| FrontierMath Tier 4 | 95% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 100% | — |
Knowledge Not comparable
Claude Opus 5.5: 66.6 (#9), Sonar Reasoning Pro: —
| Benchmark | Claude Opus 5.5 | Sonar Reasoning Pro |
|---|---|---|
| GPQA Diamond | 90.6% | — |
| SimpleQA Verified | 72.2% | — |
| LMArena Expert | 1564 | — |
Multimodal Not comparable
Claude Opus 5.5: 56.5 (#2), Sonar Reasoning Pro: —
| Benchmark | Claude Opus 5.5 | Sonar Reasoning Pro |
|---|---|---|
| Furniture Assembly | 83.3% | — |
Multilingual Not comparable
Claude Opus 5.5: 59.8 (#1), Sonar Reasoning Pro: —
| Benchmark | Claude Opus 5.5 | Sonar Reasoning Pro |
|---|---|---|
| LMArena Non-English | 1513 | — |
| LMArena Chinese | 1572 | — |
| LMArena Russian | 1532 | — |
Instruction Following Not comparable
Claude Opus 5.5: 80.1 (#2), Sonar Reasoning Pro: —
| Benchmark | Claude Opus 5.5 | Sonar Reasoning Pro |
|---|---|---|
| LMArena Instruction Following | 1535 | — |
Long Context Not comparable
Claude Opus 5.5: 47.3 (#18), Sonar Reasoning Pro: —
| Benchmark | Claude Opus 5.5 | Sonar Reasoning Pro |
|---|---|---|
| LMArena Longer Query | 1540 | — |
Writing & Preference Not comparable
Claude Opus 5.5: 78.7 (#3), Sonar Reasoning Pro: —
| Benchmark | Claude Opus 5.5 | Sonar Reasoning Pro |
|---|---|---|
| LMArena Text | 1518 | — |
| LMArena Creative Writing | 1538 | — |
| EQ-Bench Creative Writing | 2050 | — |
| LMArena Multi-Turn | 1520 | — |
Frequently asked questions
Is Claude Opus 5.5 better than Sonar Reasoning Pro?
Claude Opus 5.5 has enough public results to be ranked (#3); Sonar Reasoning Pro does not yet, so treat this comparison as directional.
Which is cheaper, Claude Opus 5.5 or Sonar Reasoning Pro?
Sonar Reasoning Pro is cheaper. It lists at $2 per million input tokens and $8 per million output tokens; Claude Opus 5.5 lists at $4 and $20.
Which has the bigger context window?
Claude Opus 5.5 does, with 1M tokens against 128K.
How many benchmarks do Claude Opus 5.5 and Sonar Reasoning Pro share?
0 benchmarks have published results for both models. Claude Opus 5.5 has 35 scored results on Noometry and Sonar Reasoning Pro has 1.