Fable 5 vs GPT-5.6 Terra
Live Unit Economics, TTFT Latency & Reasoning Benchmark Analysis
Which model is better: Fable 5 or GPT-5.6 Terra?
Verified Performance & Unit Economics Delta
Daily synchronized metrics from synthetic latency endpoints and benchmark evaluations.
| Metric / Dimension | Fable 5 | GPT-5.6 Terra | Net Delta / Advantage |
|---|---|---|---|
| Input Cost / 1M Tokens | $2.00 | $1.50 | GPT-5.6 Terra is 1.3x cheaper |
| Output Cost / 1M Tokens | $8.00 | $6.00 | GPT-5.6 Terra (33.3% lower) |
| Avg TTFT Response Latency | 240ms | 210ms | GPT-5.6 Terra (+30ms faster) |
| SWE-bench Verified (Coding) | 58% | 65.4% | GPT-5.6 Terra (+7.4% lead) |
| Inference Value Score (IVR) | 59.8 / 100 | 72.5 / 100 | GPT-5.6 Terra (+12.7 pts) |
Interactive Monthly Token Economics & ROI Forecaster
Model your expected production workload across prompt (input) and completion (output) tokens.
Estimated Monthly Spend
$2/1M in · $8/1M out
$1.5/1M in · $6/1M out
When to Choose Fable 5
Choose Fable 5 when you need Long-horizon multi-agent world simulations, narrative engine synthesis, interactive character memory, and creative reasoning. and have an infrastructure budget aligned with $2.00/1M tokens.
When to Choose GPT-5.6 Terra
Choose GPT-5.6 Terra when you need Mainstream production enterprise workflows, high-throughput developer copilots, and structured data synthesis. and prioritize OpenAI ecosystem integration at $1.50/1M tokens.
Related Questions & Decision Factors
Which is cheaper: Fable 5 or GPT-5.6 Terra?
GPT-5.6 Terra is cheaper at $1.50/1M input tokens compared to $2.00/1M for Fable 5.
Which model has lower latency: Fable 5 or GPT-5.6 Terra?
GPT-5.6 Terra delivers faster response times with an average TTFT of 210ms vs 240ms for Fable 5.
When should you choose Fable 5?
Choose Fable 5 when you need Long-horizon multi-agent world simulations, narrative engine synthesis, interactive character memory, and creative reasoning. and have an infrastructure budget aligned with $2.00/1M tokens.
When should you choose GPT-5.6 Terra?
Choose GPT-5.6 Terra when you need Mainstream production enterprise workflows, high-throughput developer copilots, and structured data synthesis. and prioritize OpenAI ecosystem integration at $1.50/1M tokens.