# Claude Opus 4.5 vs Inkling

> Side-by-side benchmark comparison for Claude Opus 4.5 and Inkling across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-opus-4-5-vs-inkling
- Last updated: October 14, 2026

- Shared sourced benchmarks: 11
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick Claude Opus 4.5 if you want the stronger benchmark profile. Inkling only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Claude Opus 4.5 leads overall 53.77 to 52.13.
- The clearest category separation is in instruction following, where the averages are 31.9 for Claude Opus 4.5 and 87.6 for Inkling.
- The biggest single benchmark swing is MCP Atlas in Agentic, with scores of 42.3% and 74.1%.
- Inkling is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Inkling also has the larger context window at 1M.

## Model Snapshot

| Property | Claude Opus 4.5 | Inkling |
|----------|----------|----------|
| Creator | Anthropic | Thinking Machines Lab |
| Type | Proprietary | Open Weight |
| Reasoning | Non-Reasoning | Hybrid |
| Context | 200K | 1M |
| Overall Score | 53.77 | 52.13 |
| Benchmarks Covered | 61 | 24 |
| Pricing (input/output) | $5.00 / $25.00 | $1.87 / $4.68 |

## Category Breakdown

### Agentic

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 31.2 (Estimated · #87/124)
- Inkling public-lane score: 36.2 (Supported · #72/124)

| Benchmark | Claude Opus 4.5 | Inkling | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 59.3% | Coming soon | Coming soon |
| OSWorld-Verified | 66.3% | Coming soon | Coming soon |
| OSWorld | 66.3% | Coming soon | Coming soon |
| Claw-Eval | 59.6% | Coming soon | Coming soon |
| QwenClawBench | 52.3% | Coming soon | Coming soon |
| τ³-bench results | 70.2% | Coming soon | Coming soon |
| VITA-Bench | 23.3% | Coming soon | Coming soon |
| DeepPlanning | 26.4% | Coming soon | Coming soon |
| Toolathlon | 43.5% | Coming soon | Coming soon |
| MCP Atlas | 42.3% | 74.1% | Inkling |
| MCP-Tasks | 71.8% | Coming soon | Coming soon |
| WideResearch | 76.4% | Coming soon | Coming soon |
| CyberGym | 50.6% | Coming soon | Coming soon |
| Gert Labs | 64.23% | Coming soon | Coming soon |
| JobBench | 32.3% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 63.8% | Coming soon |
| BrowseComp | Coming soon | 77.1% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 47.6% | Coming soon |
| CWE-bench v1 | Coming soon | 37.0% | Coming soon |

### Coding

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 40.7 (Estimated · #62/149)
- Inkling public-lane score: 34 (Supported · #80/149)

| Benchmark | Claude Opus 4.5 | Inkling | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 80.9% | 77.6% | Claude Opus 4.5 |
| LiveCodeBench v6 | 84.8% | Coming soon | Coming soon |
| SWE-bench Pro | 57.1% | 54.3% | Claude Opus 4.5 |
| SWE Multilingual | 77.5% | Coming soon | Coming soon |
| NL2Repo | 43.2% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 59.3% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 63.8% | Coming soon |
| FrontierSWE v2 | Coming soon | 4.1% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 85.5% | Coming soon |
| SWE-bench (Vals) | Coming soon | 77.6% | Coming soon |

### Reasoning

- Winner: Not comparable
- Claude Opus 4.5 public-lane score: 78.3 (Unranked · 4 rankable rows)
- Inkling public-lane score: 79 (#14/29)

| Benchmark | Claude Opus 4.5 | Inkling | Winner |
|-----------|-----------|-----------|--------|
| LongBench v2 | 64.4% | Coming soon | Coming soon |
| AI-Needle | 74% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Inkling
- Claude Opus 4.5 public-lane score: 48.6 (#49/54)
- Inkling public-lane score: 67.5 (#35/54)

| Benchmark | Claude Opus 4.5 | Inkling | Winner |
|-----------|-----------|-----------|--------|
| MMMU | 80.7% | Coming soon | Coming soon |
| MMMU-Pro | 70.6% | 73.5% | Inkling |
| RealWorldQA | 77.0% | Coming soon | Coming soon |
| OmniDocBench 1.5 | 87.7% | Coming soon | Coming soon |
| Video-MME (with subtitle) | 77.6% | Coming soon | Coming soon |
| Video-MME (w/o subtitle) | 81.4% | Coming soon | Coming soon |
| MathVision | 74.3% | Coming soon | Coming soon |
| We-Math | 70.0% | Coming soon | Coming soon |
| DynaMath | 79.7% | Coming soon | Coming soon |
| SimpleVQA | 65.7% | Coming soon | Coming soon |
| CharXiv | 68.5% | 82% | Inkling |
| CountBench | 90.6% | Coming soon | Coming soon |
| AI2D_TEST | 87.7% | Coming soon | Coming soon |
| ERQA | 46.8% | Coming soon | Coming soon |
| VideoMMMU | 84.4% | Coming soon | Coming soon |
| MLVU (M-Avg) | 81.7% | Coming soon | Coming soon |
| ScreenSpot Pro | 45.7% | Coming soon | Coming soon |
| V* | 67.0% | Coming soon | Coming soon |
| CharXiv w/o tools | Coming soon | 78.1% | Coming soon |

### Knowledge

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 51.1 (Estimated · #74/181)
- Inkling public-lane score: 54.5 (Supported · #62/181)

| Benchmark | Claude Opus 4.5 | Inkling | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 87% | 87.9% | Inkling |
| SuperGPQA | 70.6% | Coming soon | Coming soon |
| MMLU-Pro | 89.5% | Coming soon | Coming soon |
| MMLU-Redux | 96.6% | Coming soon | Coming soon |
| C-Eval | 92.2% | Coming soon | Coming soon |
| HLE | 30.8% | 46% | Inkling |
| GPQA-D | Coming soon | 87.9% | Coming soon |
| HLE w/o tools | Coming soon | 30% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 87.1% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 86.3% | Coming soon |

### Multilingual

- Winner: Not comparable
- Claude Opus 4.5 public-lane score: 96.5 (#2/17)
- Inkling public-lane score: Coming soon

| Benchmark | Claude Opus 4.5 | Inkling | Winner |
|-----------|-----------|-----------|--------|
| MMLU-ProX | 85.7% | Coming soon | Coming soon |
| NOVA-63 | 56.7% | Coming soon | Coming soon |
| INCLUDE | 86.2% | Coming soon | Coming soon |
| PolyMath | 79.0% | Coming soon | Coming soon |
| MAXIFE | 79.2% | Coming soon | Coming soon |

### Instruction Following

- Winner: Inkling
- Claude Opus 4.5 public-lane score: 31.9 (#116/128)
- Inkling public-lane score: 87.6 (#35/128)

| Benchmark | Claude Opus 4.5 | Inkling | Winner |
|-----------|-----------|-----------|--------|
| IFEval | 90.9% | Coming soon | Coming soon |
| IFBench | 58% | 79.8% | Inkling |

### Mathematics

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 61.3 (#9/12)
- Inkling public-lane score: 58.3 (#11/12)

| Benchmark | Claude Opus 4.5 | Inkling | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | 95.1% | 97.1% | Inkling |
| HMMT Feb 2025 | 92.9% | Coming soon | Coming soon |
| HMMT Nov 2025 | 93.3% | Coming soon | Coming soon |
| HMMT Feb 2026 | 85.3% | Coming soon | Coming soon |
| MMAnswerBench | 84.0% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 34.386% | 33.333% | Claude Opus 4.5 |
| FrontierMath v2 (Tier 4) | 4.878% | 4.878% | Tie |

## FAQ

### Which is better overall, Claude Opus 4.5 or Inkling?

Claude Opus 4.5 is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Opus 4.5 and Inkling?

The widest category gap is in instruction following, where the averages are 31.9 for Claude Opus 4.5 and 87.6 for Inkling.

### How many benchmarks does Claude Opus 4.5 cover on BenchLM?

Claude Opus 4.5 currently has 61 sourced benchmark scores on BenchLM.

### How many benchmarks does Inkling cover on BenchLM?

Inkling currently has 24 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Opus 4.5 vs Claude Opus 4.5 Thinking](/compare/claude-opus-4-5-vs-claude-opus-4-5-thinking)
- [Inkling vs Claude Opus 4.5 Thinking](/compare/claude-opus-4-5-thinking-vs-inkling)
- [Claude Opus 4.5 vs Inkling-Small](/compare/claude-opus-4-5-vs-inkling-small)
- [Inkling vs Inkling-Small](/compare/inkling-vs-inkling-small)

## Explore More

- [Claude Opus 4.5 profile](/models/claude-opus-4-5)
- [Inkling profile](/models/inkling)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)