Claude Fable 5.1 vs Gemma 4 31B

Select two models to compare their coding performance, pricing, and features.

Key Takeaways

Coding tier: A comparable reference index is unavailable for one or both models; no index-based winner is assigned. Editorial tiers: Claude Fable 5.1 = S+; Gemma 4 31B = No tier assessment yet. Tiers are separate editorial assessments and do not establish a reliable order within a tier.
API cost estimate: Estimated 1M in / 200K out tokens: $20.0000 (Claude Fable 5.1) vs $0.0000 (Gemma 4 31B).
Metric Claude Fable 5.1 Gemma 4 31B
Coding Index
120.65
—

Score awaiting verification
Coding tier S+ —
Input Price $10/1M $0/1M
Output Price $50/1M $0/1M
Context Window 1M 262.14K

DeepSeek V4 Flash 0731 = 100. The index reflects two shared tests, not capability multiples or statistically established gaps.

Verdict

Models awaiting tier review remain in the catalog. An unassigned tier does not mean weaker capability.

Capabilities & Use Cases Comparison

Claude Fable 5.1 Tier S+

Best For
  • •Multi-file refactoring
  • •Front-end development
Strengths
  • •Agentic coding
  • •Long-running refactors and visual development

Gemma 4 31B Tier —

Best For
  • •Self-hosting
  • •Research
  • •Lightweight coding
  • •Google ecosystem
Strengths
  • •Fully open-source by Google
  • •Good for self-hosting
  • •Lightweight variants available
  • •Active community

Claude Fable 5.1

OpenRouter quote 2026-10-11
Benchmark evidence and ranking method · Claude Fable 5.1

Cross-checked

Terminal-Bench 4.0 · Claude Code · max: 57.88% · 95% CI ± 3.76%

Artificial Analysis · Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback)

Test configuration: max

Terminal-Bench 2.1: 91.39% · SciCode: 63.08%

LiveBench · 2026-06-25 · claude-fable-5-1-max-effort

Coding: 86.38% · Agentic Coding: 66.06%

ModelRank assigns editorial tiers using public coding evidence, not automatic index thresholds or statistically proven classes. Price, speed, context size and sponsorship do not affect tiers.

DeepSeek V4 Flash 0731 = 100. The index reflects two shared tests, not capability multiples or statistically established gaps.

Results reflect particular model configurations. Agent harnesses, reasoning effort, tools, budgets and tasks may differ. Close indices do not establish superiority. B describes a relative position in this selected group, not an inability to code.

Data checked: 2026-09-10. Snapshot date is the retrieval date, not necessarily the evaluation date.

Gemma 4 31B

OpenRouter quote 2026-10-11

Results reflect particular model configurations. Agent harnesses, reasoning effort, tools, budgets and tasks may differ. Close indices do not establish superiority. B describes a relative position in this selected group, not an inability to code.

API cost estimate

1M input + 200K output (USD):

Claude Fable 5.1: $20.0000

Gemma 4 31B: $0.0000

Estimates use the displayed channel and time band; DeepSeek uses peak rates. Cache discounts, tool fees, long-context price tiers and uncounted additional tokens are excluded.

Frequently Asked Questions

Which model is better for coding: Claude Fable 5.1 or Gemma 4 31B?

A comparable reference index is unavailable for one or both models; no index-based winner is assigned. Editorial tiers: Claude Fable 5.1 = S+; Gemma 4 31B = No tier assessment yet. Tiers are separate editorial assessments and do not establish a reliable order within a tier.

How do Claude Fable 5.1 and Gemma 4 31B compare in API pricing and costs?

Claude Fable 5.1: $10/1M input, $50/1M output (OpenRouter quote); Gemma 4 31B: $0/1M input, $0/1M output (OpenRouter quote). 1M input + 200K output (USD): $20.0000 vs $0.0000.

What are the context window sizes of Claude Fable 5.1 and Gemma 4 31B?

Claude Fable 5.1 provides a 1,000,000 token context window, while Gemma 4 31B provides 262,144 tokens.

Try Claude Fable 5.1 → Try Gemma 4 31B →