HEAD TO HEAD
Make the
right call.
Pick two to four models. Compare category evidence, price, context, speed and capabilities side by side.
Sign in to save this comparison →01 / SCORECARD
Coding focus · side by side
| Metric | GPT-5.6 Luna | Grok 4.6 |
|---|---|---|
| Quantum Score | Insufficient verified data73% coverage | 52QUANTUM SCORE |
| Confidence / coverage | Limited evidence · 73% · 2 independent domains | Moderate confidence · 73% · 2 independent domains |
| Context window | 1,050,000 tokens | 500,000 tokens |
| Modalities / tools | text, image · tool use, vision | text, image · vision, tool use |
| Coding | 70 | 36 -34 vs first |
| Reasoning | 51 | 65 +14 vs first |
| Math | 67 | 66 -1 vs first |
| Research | — | — |
| Agents | 20 | 60 +40 vs first |
| Multimodal | — | — |
| Speed | — | — |
| Value | 50 | 44 -6 vs first |
| Input / 1M | $0.20 | $2.00 |
| Output / 1M | $1.20 | $6.00 |
| Measured output speed | — | — |
02 / EVIDENCE
Published benchmark evidence
| Benchmark | GPT-5.6 Luna | Grok 4.6 |
|---|---|---|
| ARC-AGI-3 Semi-Private Standard harness best effort · 3 Semi-Private · ARC Prize Standard harness; best published effort per model | 0.18 % benchmark maintainer ↗ | 2.11 % benchmark maintainer ↗ |
| LiveBench code_completion · 2026-06-25 · Public table; published model effort variant | 86.957 % benchmark maintainer ↗ | 76.087 % benchmark maintainer ↗ |
| LiveBench code_generation · 2026-06-25 · Public table; published model effort variant | 78.873 % benchmark maintainer ↗ | 77.465 % benchmark maintainer ↗ |
| LiveBench javascript · 2026-06-25 · Public table; published model effort variant | 63.636 % benchmark maintainer ↗ | 72.727 % benchmark maintainer ↗ |
| LiveBench AMPS_Hard · 2026-06-25 · Public table; published model effort variant | 98 % benchmark maintainer ↗ | 97 % benchmark maintainer ↗ |
| LiveBench olympiad · 2026-06-25 · Public table; published model effort variant | 88.646 % benchmark maintainer ↗ | 91.213 % benchmark maintainer ↗ |
| LiveBench theory_of_mind · 2026-06-25 · Public table; published model effort variant | 73.077 % benchmark maintainer ↗ | 86.538 % benchmark maintainer ↗ |
| LiveBench zebra_puzzle · 2026-06-25 · Public table; published model effort variant | 93.5 % benchmark maintainer ↗ | 95.5 % benchmark maintainer ↗ |
AS THE EVIDENCE CHANGED
Comparison history
Dated releases, price events, and benchmark publications. A price or test change can alter the factual comparison; this timeline does not pick a winner.
2026-08-12 · Grok 4.6 released with published agent evaluations ↗ · source
2026-07-09 · GPT-5.6 Luna released ↗ · source
2026-09-30 verified (test date not published) · gpt-5.6-luna entered LiveBench code_completion (2026-06-25) at 86.957 % · source ↗
2026-09-30 verified (test date not published) · gpt-5.6-luna entered LiveBench code_generation (2026-06-25) at 78.873 % · source ↗
2026-09-30 verified (test date not published) · gpt-5.6-luna entered LiveBench javascript (2026-06-25) at 63.636 % · source ↗
2026-09-30 verified (test date not published) · gpt-5.6-luna entered LiveBench AMPS_Hard (2026-06-25) at 98 % · source ↗
2026-09-30 verified (test date not published) · gpt-5.6-luna entered LiveBench olympiad (2026-06-25) at 88.646 % · source ↗
2026-09-30 verified (test date not published) · gpt-5.6-luna entered LiveBench theory_of_mind (2026-06-25) at 73.077 % · source ↗
2026-09-30 verified (test date not published) · gpt-5.6-luna entered LiveBench zebra_puzzle (2026-06-25) at 93.5 % · source ↗
2026-09-30 verified (test date not published) · grok-4-6 entered LiveBench code_completion (2026-06-25) at 76.087 % · source ↗
2026-09-30 verified (test date not published) · grok-4-6 entered LiveBench code_generation (2026-06-25) at 77.465 % · source ↗
2026-09-30 verified (test date not published) · grok-4-6 entered LiveBench javascript (2026-06-25) at 72.727 % · source ↗
2026-09-30 verified (test date not published) · grok-4-6 entered LiveBench AMPS_Hard (2026-06-25) at 97 % · source ↗
2026-09-30 verified (test date not published) · grok-4-6 entered LiveBench olympiad (2026-06-25) at 91.213 % · source ↗
An overall score appears only after enough current, comparable, independently sourced results exist. Pricing and individual benchmark results remain visible meanwhile.