Compare / head-to-head
GPT-5.6 TerravsSonar Reasoning Pro
GPT-5.6 Terra and Sonar Reasoning Pro do not yet share a public benchmark, so quality cannot be compared apples-to-apples. Sonar Reasoning Pro is 1.4x cheaper per token. GPT-5.6 Terra has the larger context window (1.1M tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
0
no overlap yet
Cheaper per token
Sonar Reasoning Pro
1.4x cheaper, input + output
Larger context
GPT-5.6 Terra
1.1M tokens
Provider uptime (30d)
95.493% · 100%
OpenAI · Perplexity
GPT-5.6 Terra
OpenAI · released 2026-07-09
textvision
Sonar Reasoning Pro
Perplexity
text
Quality
Benchmark matrix
0 shared · 7 only GPT-5.6 Terra · 0 only Sonar Reasoning Pro| Benchmark | GPT-5.6 Terra | Sonar Reasoning Pro | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 0 | ||||
| No public benchmark is reported for both models yet. | ||||
| Only GPT-5.6 Terra reports · 7 | ||||
| GPQA Diamond | 92.9% ↗ | not reported | — | — |
| DeepSWE v1.1 | 69.6% ↗ | not reported | — | — |
| FrontierMath Tier 4 v2 (Epoch AI run) | 70.7% ↗epoch | not reported | — | — |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 86% ↗epoch | not reported | — | — |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 99.7% ↗epoch | not reported | — | — |
| SimpleQA Verified | 43.2% ↗epoch | not reported | — | — |
| SWE-Bench Pro | 63.4% ↗ | not reported | — | — |
| Only Sonar Reasoning Pro reports · 0 | ||||
| Sonar Reasoning Pro reports nothing GPT-5.6 Terra 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-5.6 Terra minus Sonar Reasoning Pro 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-5.6 Terra | Sonar Reasoning Pro | Edge |
|---|---|---|---|
| Context window | 1.1M tokens | 128K tokens | GPT-5.6 Terra |
| Max output | 128K tokens | — | — |
| Input price / 1M | $2 ↗ | $2 ↗ | Tie |
| Output price / 1M | $12 ↗ | $8 ↗ | Sonar Reasoning Pro |
| Cached input / 1M | $0.2 ↗ | — | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $14 | $10 | Sonar Reasoning Pro |
| Modalities | text · vision | text | GPT-5.6 Terra |
| Released | 2026-07-09 | — | — |
| Cited benchmark scores | 8 | 0 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
GPT-5.6 Terra vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run GPT-5.6 Terra and Sonar Reasoning Pro on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.