LLM Comparison

GPT-5.5 vs GPT-5.6 Terra: benchmark scores, pricing & comparison.

Side-by-side GPT-5.5 vs GPT-5.6 Terra comparison across SWE-bench, GPQA, HLE, Terminal-Bench, coding agent scores, token pricing, context window, and AskClash RWT. Green marks the winner on each benchmark.

Open live leaderboardGPT-5.5 model pageGPT-5.6 Terra model page
Rank #7 vs #8AskClash overall scores 76.9 vs 76.3.
Pricing $5.00/$30.0 vs $2.50/$15.0Input and output token prices per 1M tokens when published.
Proprietary vs ProprietaryOpenAI vs OpenAI.

GPT-5.5 vs GPT-5.6 Terra benchmark comparison

Green cells highlight the winning model for each metric. Scores are cached from the AskClash LLM leaderboard snapshot.

MetricGPT-5.5GPT-5.6 Terra
Overall Score76.976.3
Leaderboard Rank#7#8
RWT8.08.5
Coding Agent Index76.477.0
HLE52.2—
GPQA93.692.9
SWE-Pro58.663.4
SWE-Atlas—81.0
Terminal-Bench82.787.4
DeepSWE67.069.6
OSWorld78.7—
MCP Atlas75.3—
Finance Agent51.852.4
MMMU-Pro81.280.7
ARC-AGI 285.083.9
Tau298.086.3
MRCR—89.6
Input Price (per 1M tokens)$5.00$2.50
Output Price (per 1M tokens)$30.0$15.0
Context Window1M1M
Benchmarks Published1313

GPT-5.5 vs GPT-5.6 Terra head-to-head charts

GPT-5.5 leads 5 and GPT-5.6 Terra leads 6 of 11 shared benchmarks. GPT-5.6 Terra is cheaper on a defined 1M-input / 200K-output workload. Charts show only benchmarks both models publish.

GPT-5.5GPT-5.6 Terra
Overall
76.9GPT-5.5
76.3GPT-5.6 Terra
RWT
8.0GPT-5.5
8.5GPT-5.6 Terra
Coding Agent Index
76.4GPT-5.5
77.0GPT-5.6 Terra
GPQA
93.6GPT-5.5
92.9GPT-5.6 Terra
SWE-Pro
58.6GPT-5.5
63.4GPT-5.6 Terra
Terminal-Bench
82.7GPT-5.5
87.4GPT-5.6 Terra
DeepSWE
67.0GPT-5.5
69.6GPT-5.6 Terra
Finance Agent
51.8GPT-5.5
52.4GPT-5.6 Terra
MMMU-Pro
81.2GPT-5.5
80.7GPT-5.6 Terra
ARC-AGI 2
85.0GPT-5.5
83.9GPT-5.6 Terra
Tau2
98.0GPT-5.5
86.3GPT-5.6 Terra
GPT-5.5
Input$5.00
Output$30.0
Workload$11
Context1M
GPT-5.6 Terra
Input$2.50
Output$15.0
Workload$5.50
Context1M

Workload = published cost of 1M input + 200K output tokens. Open the live leaderboard for interactive compare charts.

More GPT-5.5 and GPT-5.6 Terra comparisons

Explore how GPT-5.5 and GPT-5.6 Terra stack up against other top-ranked LLMs.

Claude Fable 5 vs GPT-5.5Claude Fable 5 vs GPT-5.6 TerraGPT-5.6 Sol vs GPT-5.5GPT-5.6 Sol vs GPT-5.6 TerraKimi K3 vs GPT-5.5Kimi K3 vs GPT-5.6 TerraClaude Opus 4.8 vs GPT-5.5Claude Opus 4.8 vs GPT-5.6 TerraGrok 4.5 vs GPT-5.5Grok 4.5 vs GPT-5.6 Terra

How to read this comparison

Benchmark scores

Higher is better for all benchmark scores (SWE-bench, GPQA, HLE, Terminal-Bench, etc.). Green marks the model with the higher score.

Token pricing

Lower is better for input and output prices. Green marks the cheaper model per 1M tokens.

Coverage matters

Models with fewer disclosed benchmark cells may have inflated percentile scores. Check the benchmark cell count for context.

This comparison page is generated from the AskClash LLM leaderboard cache. Open the live leaderboard for real-time scores and interactive filtering.