LLM Comparison

Claude Fable 5.1 vs GPT-5.6 Terra: benchmark scores, pricing & comparison.

Side-by-side Claude Fable 5.1 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.

Verdict: Claude Fable 5.1 ranks higher (#2 vs #16) and wins 10 of 11 shared benchmarks; GPT-5.6 Terra costs less ($2.50/$15.0 vs $10.0/$50.0 per 1M tokens).

Open live leaderboardClaude Fable 5.1 model pageGPT-5.6 Terra model page
Rank #2 vs #16AskClash overall scores 78.0 vs 60.3.
Pricing $10.0/$50.0 vs $2.50/$15.0Input and output token prices per 1M tokens when published.
Proprietary vs ProprietaryAnthropic vs OpenAI.

Claude Fable 5.1 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.

MetricClaude Fable 5.1GPT-5.6 Terra
Overall Score78.060.3
Leaderboard Rank#2#16
ACB79.256.4
RWT9.08.5
Coding Agent Index—77.0
HLE65.042.9
GPQA93.792.9
IFEval—71.2
SWE-Pro81.263.4
SWE-Atlas—81.0
Terminal-Bench52.035.4
DeepSWE67.469.6
GDPval-AA1853.01593.0
Finance Agent58.954.4
MMMU-Pro90.680.7
ARC-AGI 290.083.9
Tau2—86.3
MRCR—89.6
Input Price (per 1M tokens)$10.0$2.50
Output Price (per 1M tokens)$50.0$15.0
Context Window1M1M
Benchmarks Published1315

Claude Fable 5.1 vs GPT-5.6 Terra head-to-head charts

Claude Fable 5.1 leads 11 and GPT-5.6 Terra leads 1 of 12 shared benchmarks. GPT-5.6 Terra is cheaper on a defined 1M-input / 200K-output workload. Charts show only benchmarks both models publish.

Claude Fable 5.1GPT-5.6 Terra
Overall
78.0Claude Fable 5.1
60.3GPT-5.6 Terra
ACB
79.2Claude Fable 5.1
56.4GPT-5.6 Terra
RWT
9.0Claude Fable 5.1
8.5GPT-5.6 Terra
HLE
65.0Claude Fable 5.1
42.9GPT-5.6 Terra
GPQA
93.7Claude Fable 5.1
92.9GPT-5.6 Terra
SWE-Pro
81.2Claude Fable 5.1
63.4GPT-5.6 Terra
Terminal-Bench
52.0Claude Fable 5.1
35.4GPT-5.6 Terra
DeepSWE
67.4Claude Fable 5.1
69.6GPT-5.6 Terra
GDPval-AA
1853.0Claude Fable 5.1
1593.0GPT-5.6 Terra
Finance Agent
58.9Claude Fable 5.1
54.4GPT-5.6 Terra
MMMU-Pro
90.6Claude Fable 5.1
80.7GPT-5.6 Terra
ARC-AGI 2
90.0Claude Fable 5.1
83.9GPT-5.6 Terra
Claude Fable 5.1
Input$10.0
Output$50.0
Workload$20
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 Claude Fable 5.1 and GPT-5.6 Terra comparisons

Explore how Claude Fable 5.1 and GPT-5.6 Terra stack up against other top-ranked LLMs.

Claude Opus 5.5 vs Claude Fable 5.1Claude Opus 5.5 vs GPT-5.6 TerraClaude Fable 5.1 vs Claude Sonnet 5.5Claude Sonnet 5.5 vs GPT-5.6 TerraClaude Fable 5.1 vs Claude Opus 5Claude Opus 5 vs GPT-5.6 TerraClaude Fable 5.1 vs Claude Fable 5Claude Fable 5 vs GPT-5.6 TerraClaude Fable 5.1 vs Gemini 4 ArgonGemini 4 Argon 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.