Compare / head-to-head
GPT-5.5vs
Inkling
GPT-5.5 leads 21 of 23 shared benchmarks. Inkling is 6.9x cheaper per token. Both offer a 1M-token context window.
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
21 – 2
GPT-5.5 leads
Cheaper per token
Inkling
6.9x cheaper, input + output
Larger context
Tie
both 1M tokens
Providers
2 providers
OpenAI · Thinking Machines Lab
GPT-5.5
OpenAI · released 2026-04-23
textvision
Quality
Benchmark matrix
23 shared · 21 only GPT-5.5 · 15 only Inkling| Benchmark | GPT-5.5 | Inkling | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 23 | ||||
| GPQA Diamond | 90.7% ↗epoch run | 88.3% ↗epoch run | +2.4 pt | GPT-5.5 |
| AIME 2026 | 100% ↗matharena ⚠ | 97.1% ↗ | +2.9 pt | GPT-5.5 |
| LMArena Elo | 1465.6 ↗ | 1441.4 ↗ | +24.2 | GPT-5.5 |
| APEX-Agents (Mercor) | 55.1% ↗ | 33.8% ↗ | +21.3 pt | GPT-5.5 |
| Chess Puzzles (Epoch AI run) | 26% ↗epoch run | 21% ↗epoch run | +5 pt | GPT-5.5 |
| FrontierMath Tier 4 v2 (Epoch AI run) | 72.5% ↗epoch run | 4.9% ↗epoch run | +67.6 pt | GPT-5.5 |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 85.3% ↗epoch run | 33.3% ↗epoch run | +52 pt | GPT-5.5 |
| LiveBench Agentic Coding (LiveBench) | 54% ↗ | 49.4% ↗ | +4.6 pt | GPT-5.5 |
| LiveBench Coding (LiveBench) | 82.1% ↗ | 71% ↗ | +11.1 pt | GPT-5.5 |
| LiveBench Data Analysis (LiveBench) | 81.6% ↗ | 72.8% ↗ | +8.8 pt | GPT-5.5 |
| LiveBench Instruction Following (LiveBench) | 70.7% ↗ | 70.1% ↗ | +0.6 pt | GPT-5.5 |
| LiveBench Language (LiveBench) | 87.4% ↗ | 73.5% ↗ | +13.9 pt | GPT-5.5 |
| LiveBench Mathematics (LiveBench) | 95.9% ↗ | 88.4% ↗ | +7.5 pt | GPT-5.5 |
| LiveBench Reasoning (LiveBench) | 89.7% ↗ | 78.3% ↗ | +11.4 pt | GPT-5.5 |
| LMArena Agent (LMArena) | 0.0415 ↗ | -0.1086 ↗ | +0.2 | GPT-5.5 |
| MCP Atlas | 75.3% ↗ | 76% ↗ | -0.7 pt | Inkling |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 84.4% ↗epoch run | 88.9% ↗epoch run | -4.5 pt | Inkling |
| SAGE (Vals AI) | 51.5% ↗ | 36.6% ↗ | +14.9 pt | GPT-5.5 |
| SimpleBench (SimpleBench) | 69% ↗ | 50% ↗ | +19 pt | GPT-5.5 |
| SimpleQA Verified | 63% ↗epoch run | 43.9% ↗ | +19.1 pt | GPT-5.5 |
| tau2-bench Banking Knowledge (Sierra) | 44.6% ↗ | 25% ↗ | +19.6 pt | GPT-5.5 |
| Toolathlon-Verified (HKUST) | 73.5% ↗ | 45.5% ↗ | +28 pt | GPT-5.5 |
| WeirdML (Håvard Tveit Ihle) | 84.9% ↗ | 32.3% ↗ | +52.6 pt | GPT-5.5 |
| Only GPT-5.5 reports · 21 | ||||
| ARC-AGI-1 (Verified) | 95% ↗ | not reported | — | — |
| ARC-AGI-2 (Verified) | 85% ↗ | not reported | — | — |
| BrowseComp | 84.4% ↗ | not reported | — | — |
| DeepSWE v1.1 (Datacurve) | 67% ↗ | not reported | — | — |
| EBR-bench (Epoch AI run) | 34.3% ↗epoch run | not reported | — | — |
| FrontierMath Tier 1-3 | 51.7% ↗ | not reported | — | — |
| FrontierMath Tier 4 | 35.4% ↗ | not reported | — | — |
| Furniture Assembly (Epoch AI run) | 44.2% ↗epoch run | not reported | — | — |
| GDPval (wins or ties) | 84.9% ↗ | not reported | — | — |
| GSO Opt@1 (GSO) | 37.3% ↗ | not reported | — | — |
| LMArena Vision (LMArena) | 1286.5 ↗ | not reported | — | — |
| MirrorCode (Epoch AI run) | 10% ↗epoch run | not reported | — | — |
| MMMU-Pro (no tools) | 81.2% ↗ | not reported | — | — |
| MMMU-Pro (with tools) | 83.2% ↗ | not reported | — | — |
| Mystery Game Puzzles (Epoch AI run) | 56% ↗epoch run | not reported | — | — |
| OSWorld-Verified | 78.7% ↗ | not reported | — | — |
| SWE-Bench Pro | 58.6% ↗ | not reported | — | — |
| Tau2-bench Telecom | 98% ↗ | not reported | — | — |
| Terminal-Bench 2.0 | 82.7% ↗ | not reported | — | — |
| Toolathlon | 55.6% ↗ | not reported | — | — |
| Vending-Bench 2 (Andon Labs) | 7523.84 ↗ | not reported | — | — |
| Only Inkling reports · 15 | ||||
| SWE-bench Verified | not reported | 77.6% ↗ | — | — |
| Audio MC | not reported | 56.6% ↗ | — | — |
| BrowseComp (w/ ctx management) | not reported | 77.1% ↗ | — | — |
| CharXiv RQ | not reported | 78.1% ↗ | — | — |
| CharXiv RQ (with python) | not reported | 82% ↗ | — | — |
| FrontierSWE V2 (Proximal Labs) | not reported | 4.1% ↗ | — | — |
| Global-MMLU-Lite | not reported | 88.7% ↗ | — | — |
| IFBench | not reported | 79.8% ↗ | — | — |
| LMArena WebDev (LMArena) | not reported | 1412.6 ↗ | — | — |
| MMAU | not reported | 77.2% ↗ | — | — |
| SWE-bench Pro (public) | not reported | 54.3% ↗ | — | — |
| Terminal-Bench 2.1 (best harness) | not reported | 63.8% ↗ | — | — |
| Terminal-Bench 4.0 (Vals AI) | not reported | 0.5% ↗ | — | — |
| Toolathlon Verified | not reported | 45.5% ↗ | — | — |
| VoiceBench | not reported | 91.4% ↗ | — | — |
Scores tagged "epoch" or "matharena" are independent runs, used only where the lab has not published its own; ⚠ marks rows MathArena flags as released after the competition. Higher is better on every row. Δ is GPT-5.5 minus Inkling in the benchmark's own unit. "Not reported" means the lab has not published that figure; it is not a zero. ↗ opens the source.
Specs & pricing
Side by side
Official pricing pages and model cards| Spec | GPT-5.5 | Inkling | Edge |
|---|---|---|---|
| Context window | 1M tokens | 1M tokens | Tie |
| Max output | 128K tokens | — | — |
| Input price / 1M | $5 ↗ | $1 ↗ | Inkling |
| Output price / 1M | $30 ↗ | $4.05 ↗ | Inkling |
| Cached input / 1M | $0.5 ↗ | $0.17 ↗ | Inkling |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $35 | $5.05 | Inkling |
| Modalities | text · vision | text · vision · audio | Inkling |
| Released | 2026-04-23 | 2026-07-15 | — |
| Cited benchmark scores | 50 | 39 | — |
Reliability
Provider status
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Which one wins on your data?
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