Claude Fable 5 vs Gemini 3.1

Anthropic's frontier flagship against Google's multimodal flagship (ultra · pro tiers) — published pricing, context windows and specs, side by side.

Compiled by AI Model Hub · Last updated 8 July 2026 · All figures from the two models' AI Model Hub pages (vendor release materials and independent trackers)

At a glance: Claude Fable 5 lists at $10 / $50 per 1M tokens with a 1,000,000 tokens context window; Gemini 3.1 lists at ~$2 / $12 per 1M tokens (3.1 Pro) with 2,000,000 tokens of context. The full spec table, price table and each model's published benchmarks are below.

On this page

Side-by-side specs
Price comparison
What the table says
FAQ

Claude Fable 5 vs Gemini 3.1: side-by-side

	Claude Fable 5	Gemini 3.1
Maker	Anthropic	Google
Released	9 June 2026 · back globally 1 July 2026	April 2026
Tier	Frontier flagship	Multimodal flagship (Ultra · Pro tiers)
Context window	1,000,000 tokens (default & max)	2,000,000 tokens — largest publicly available
Max output	Up to 128,000 tokens	Not specified
API price (per 1M)	$10 / $50 per 1M tokens	~$2 / $12 per 1M tokens (3.1 Pro)
Access	Proprietary — Claude API, claude.ai, Claude Code, AWS Bedrock, Google Cloud, Microsoft Foundry	Proprietary — Gemini API (Google) · consumer plan $19.99/month
Best at	Hardest reasoning and agentic tasks	Multimodal understanding, very long documents, media analysis
Standout	Anthropic's most capable released model; falls back to Opus 4.8 on some topics (<5% of sessions)	Native video, audio and text in one pass + sandboxed Python execution

Price comparison

Model	Input (per 1M)	Output (per 1M)
Claude Fable 5	$10.00	$50.00
Gemini 3.1 Pro (approx.)	~$2.00	~$12.00

Estimate your monthly API cost for Claude Fable 5 vs Gemini 3.1 with the LLM API pricing calculator →

What the table says

Pricing. Claude Fable 5 lists at $10 / $50 per 1M tokens; Gemini 3.1 lists at ~$2 / $12 per 1M tokens (3.1 Pro). On these published rates, Gemini 3.1's input price is roughly 5x lower than Claude Fable 5's, and Gemini 3.1's output price is roughly 4.2x lower than Claude Fable 5's.
Context. Gemini 3.1's context window (2,000,000 tokens — largest publicly available) is about 2x the size of Claude Fable 5's (1,000,000 tokens (default & max)).
Access. Both are proprietary, hosted-API models; neither publishes weights for self-hosting.

Key takeaway

Everything above is drawn from the two models' published rate cards and spec sheets. Which one fits depends on the workload you price it against — run your own token volumes through the pricing calculator to see the monthly difference.

Full Claude Fable 5 overview Full Gemini 3.1 overview

Frequently asked questions

Which is cheaper, Claude Fable 5 or Gemini 3.1?

Gemini 3.1 — it lists at ~$2 / $12 per 1M tokens (3.1 Pro) versus $10 / $50 per 1M tokens for Claude Fable 5 (Gemini 3.1 Pro pricing is approximate).

Which has the bigger context window, Claude Fable 5 or Gemini 3.1?

Gemini 3.1 — 2,000,000 tokens — largest publicly available, versus 1,000,000 tokens (default & max) for Claude Fable 5.

Which model is newer?

Claude Fable 5 is the more recent release (9 June 2026 · back globally 1 July 2026); Gemini 3.1 was released April 2026.

Can I run Claude Fable 5 or Gemini 3.1 locally?

No — both Claude Fable 5 and Gemini 3.1 are proprietary models accessed through their vendors' APIs and apps; neither publishes weights.

Related comparisons

Sources & further reading: