Compare / head-to-head
GPT-6 Lunavs
Inkling-Small
GPT-6 Luna leads 12 of 12 shared benchmarks. GPT-6 Luna is 2.5x cheaper per token. GPT-6 Luna has the larger context window (1.1M tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
12 – 0
GPT-6 Luna leads
Cheaper per token
GPT-6 Luna
2.5x cheaper, input + output
Larger context
GPT-6 Luna
1.1M tokens
Providers
2 providers
OpenAI · Thinking Machines Lab
GPT-6 Luna
OpenAI · released 2026-09-22
textvision
Inkling-Small
Thinking Machines Lab · released 2026-07-30
textvisionaudio
Quality
Benchmark matrix
12 shared · 10 only GPT-6 Luna · 16 only Inkling-Small| Benchmark | GPT-6 Luna | Inkling-Small | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 12 | ||||
| GPQA Diamond | 90.5% ↗epoch run | 88.5% ↗epoch run | +2 pt | GPT-6 Luna |
| LMArena Elo | 1442.9 ↗ | 1405.2 ↗ | +37.7 | GPT-6 Luna |
| Chess Puzzles (Epoch AI run) | 31% ↗epoch run | 18% ↗epoch run | +13 pt | GPT-6 Luna |
| FrontierMath Tier 4 v2 (Epoch AI run) | 56.1% ↗epoch run | 17.1% ↗epoch run | +39 pt | GPT-6 Luna |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 78.9% ↗epoch run | 46.3% ↗epoch run | +32.6 pt | GPT-6 Luna |
| LMArena Agent (LMArena) | 0.0135 ↗ | -0.1033 ↗ | +0.1 | GPT-6 Luna |
| LMArena WebDev (LMArena) | 1578.7 ↗ | 1408.2 ↗ | +170.5 | GPT-6 Luna |
| Mystery Game Puzzles (Epoch AI run) | 7% ↗epoch run | 6% ↗epoch run | +1 pt | GPT-6 Luna |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 98.9% ↗epoch run | 90% ↗epoch run | +8.9 pt | GPT-6 Luna |
| SAGE (Vals AI) | 48.1% ↗ | 32.7% ↗ | +15.4 pt | GPT-6 Luna |
| SimpleQA Verified | 41.4% ↗epoch run | 20.6% ↗ | +20.8 pt | GPT-6 Luna |
| Terminal-Bench 4.0 (Vals AI) | 13.6% ↗ | 0% ↗ | +13.6 pt | GPT-6 Luna |
| Only GPT-6 Luna reports · 10 | ||||
| APEX-Agents (Mercor) | 44.3% ↗ | not reported | — | — |
| DeepSWE v1.1 | 66.6% ↗ | not reported | — | — |
| Furniture Assembly (Epoch AI run) | 44.2% ↗epoch run | not reported | — | — |
| LiveBench Agentic Coding (LiveBench) | 51.2% ↗ | not reported | — | — |
| LiveBench Coding (LiveBench) | 79% ↗ | not reported | — | — |
| LiveBench Data Analysis (LiveBench) | 73.4% ↗ | not reported | — | — |
| LiveBench Instruction Following (LiveBench) | 55.9% ↗ | not reported | — | — |
| LiveBench Language (LiveBench) | 73.8% ↗ | not reported | — | — |
| LiveBench Mathematics (LiveBench) | 89.1% ↗ | not reported | — | — |
| LiveBench Reasoning (LiveBench) | 81.8% ↗ | not reported | — | — |
| Only Inkling-Small reports · 16 | ||||
| SWE-bench Verified | not reported | 80.2% ↗ | — | — |
| AIME 2026 | not reported | 95.5% ↗ | — | — |
| ARC-AGI-1 | not reported | 84% ↗ | — | — |
| ARC-AGI-2 | not reported | 40.1% ↗ | — | — |
| BrowseComp (with context management) | not reported | 77.4% ↗ | — | — |
| CharXiv RQ | not reported | 77.4% ↗ | — | — |
| CharXiv RQ (with python) | not reported | 81.3% ↗ | — | — |
| HMMT Feb 2026 | not reported | 90.2% ↗ | — | — |
| IFBench | not reported | 82.2% ↗ | — | — |
| LMArena Vision (LMArena) | not reported | 1206.3 ↗ | — | — |
| MCP Atlas (all) | not reported | 79.2% ↗ | — | — |
| MMAU | not reported | 77% ↗ | — | — |
| SWE-bench Pro (public) | not reported | 55.9% ↗ | — | — |
| Terminal-Bench 2.1 (best harness) | not reported | 64.7% ↗ | — | — |
| Toolathlon Verified | not reported | 54.4% ↗ | — | — |
| Toolathlon-Verified (HKUST) | not reported | 54.4% ↗ | — | — |
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-6 Luna minus Inkling-Small 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-6 Luna | Inkling-Small | Edge |
|---|---|---|---|
| Context window | 1.1M tokens | 1M tokens | GPT-6 Luna |
| Max output | 128K tokens | — | — |
| Input price / 1M | $0.1 ↗ | $0.3 ↗ | GPT-6 Luna |
| Output price / 1M | $0.5 ↗ | $1.2 ↗ | GPT-6 Luna |
| Cached input / 1M | $0.01 ↗ | $0.06 ↗ | GPT-6 Luna |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $0.6 | $1.5 | GPT-6 Luna |
| Modalities | text · vision | text · vision · audio | Inkling-Small |
| Released | 2026-09-22 | 2026-07-30 | — |
| Cited benchmark scores | 22 | 29 | — |
Reliability
Provider status
Live from /statusMore matchups
GPT-6 Luna vs …
Models sharing the most benchmarksMore matchups
Inkling-Small vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run GPT-6 Luna and Inkling-Small on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.