Compare / head-to-head
GPT-6 Solvs
Mercury 2.5
GPT-6 Sol leads 1 of 1 shared benchmark. Mercury 2.5 is 12.6x cheaper per token. GPT-6 Sol has the larger context window (1.1M tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
1 – 0
GPT-6 Sol leads
Cheaper per token
Mercury 2.5
12.6x cheaper, input + output
Larger context
GPT-6 Sol
1.1M tokens
Providers
2 providers
OpenAI · Inception
GPT-6 Sol
OpenAI · released 2026-09-22
textvision
Mercury 2.5
Inception · released 2026-09-08
text
Quality
Benchmark matrix
1 shared · 26 only GPT-6 Sol · 0 only Mercury 2.5| Benchmark | GPT-6 Sol | Mercury 2.5 | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 1 | ||||
| Terminal-Bench 4.0 (Vals AI) | 44.4% ↗ | 0% ↗ | +44.4 pt | GPT-6 Sol |
| Only GPT-6 Sol reports · 26 | ||||
| GPQA Diamond | 94.3% ↗epoch run | not reported | — | — |
| LMArena Elo | 1457.2 ↗ | not reported | — | — |
| Agents' Last Exam V1 | 56.4% ↗ | not reported | — | — |
| APEX-Agents (Mercor) | 54.3% ↗ | not reported | — | — |
| AutomationBench 1.0.6 | 33.2% ↗ | not reported | — | — |
| DeepSWE v1.1 | 68.8% ↗ | not reported | — | — |
| EBR-bench (Epoch AI run) | 53.3% ↗epoch run | not reported | — | — |
| FrontierMath Tier 4 v2 (Epoch AI run) | 90% ↗epoch run | not reported | — | — |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 89.8% ↗epoch run | not reported | — | — |
| Furniture Assembly (Epoch AI run) | 58.3% ↗epoch run | not reported | — | — |
| LiveBench Agentic Coding (LiveBench) | 52.9% ↗ | not reported | — | — |
| LiveBench Coding (LiveBench) | 81.8% ↗ | not reported | — | — |
| LiveBench Data Analysis (LiveBench) | 81.2% ↗ | not reported | — | — |
| LiveBench Instruction Following (LiveBench) | 68.6% ↗ | not reported | — | — |
| LiveBench Language (LiveBench) | 85.3% ↗ | not reported | — | — |
| LiveBench Mathematics (LiveBench) | 96.4% ↗ | not reported | — | — |
| LiveBench Reasoning (LiveBench) | 88.7% ↗ | not reported | — | — |
| LMArena Agent (LMArena) | 0.0971 ↗ | not reported | — | — |
| LMArena WebDev (LMArena) | 1689 ↗ | not reported | — | — |
| Mystery Game Puzzles (Epoch AI run) | 56% ↗epoch run | not reported | — | — |
| OSWorld 2.0 (offline, partial) | 60.5% ↗ | not reported | — | — |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 100% ↗epoch run | not reported | — | — |
| SAGE (Vals AI) | 44.8% ↗ | not reported | — | — |
| SimpleBench (SimpleBench) | 73.1% ↗ | not reported | — | — |
| SimpleQA Verified | 60.7% ↗epoch run | not reported | — | — |
| Vending-Bench 2 (Andon Labs) | 14427.85 ↗ | not reported | — | — |
| Only Mercury 2.5 reports · 0 | ||||
| Mercury 2.5 reports nothing GPT-6 Sol does not. | ||||
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 Sol minus Mercury 2.5 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 Sol | Mercury 2.5 | Edge |
|---|---|---|---|
| Context window | 1.1M tokens | 260K tokens | GPT-6 Sol |
| Max output | 128K tokens | 66K tokens | GPT-6 Sol |
| Input price / 1M | $2 ↗ | $0.2 ↗ | Mercury 2.5 |
| Output price / 1M | $10 ↗ | $0.75 ↗ | Mercury 2.5 |
| Cached input / 1M | $0.2 ↗ | $0.02 ↗ | Mercury 2.5 |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $12 | $0.95 | Mercury 2.5 |
| Modalities | text · vision | text | GPT-6 Sol |
| Released | 2026-09-22 | 2026-09-08 | — |
| Cited benchmark scores | 27 | 1 | — |
Reliability
Provider status
Live from /statusMore matchups
GPT-6 Sol vs …
Models sharing the most benchmarksMore matchups
Mercury 2.5 vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run GPT-6 Sol and Mercury 2.5 on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.