Claude Fable 5.2 vs Gemini 4 Carbon
There is no quality verdict yet: the AIGROW small-business benchmark has not run either model. On price, Gemini 4 Carbon costs less: $2 in and $10 out per million tokens, against $8 in and $40 out for Claude Fable 5.2.
Run Claude Fable 5.2 up to 60% below list price. $25 a month brings $110 of API credit and cancels any time; $25 once buys $100. US dollars, standard rate, shortest context band. Price only: the benchmark has not run both.
- Claude Fable 5.2
- $40.00
- Gemini 4 Carbon
- $10.00
- Claude Fable 5.2, per M tokens
- $8 / $40
- Gemini 4 Carbon, per M tokens
- $2 / $10
3,000 tokens in and 400 out each, at list price.
The models Anthropic and Google offer for their hardest work, with Carbon at a quarter of the Fable price until December, then half. 1,000 support replies cost $40.00 on Claude Fable 5.2 and $10.00 on Gemini 4 Carbon, so Claude Fable 5.2 costs 4 times as much.
What each one costs
The API price per million tokens and the cheapest app plan with each model, from the makers’ own pages. Each name opens that model’s full price page.
- Claude Fable 5.2
- On the Anthropic API, Claude Fable 5.2 costs $8 per million input tokens and $40 per million output tokens. AIGROW API credit runs Claude Fable 5.2 at $3.20 / $16.00 per million input / output tokens, up to 60% below list price. See API credit
- Gemini 4 Carbon
- On the Google API, Gemini 4 Carbon costs $2 per million input tokens and $10 per million output tokens.
$25 a month brings $110 of API credit and cancels any time; $25 once buys $100.
Side by side
Each maker’s published rate for its standard tier. Cached input is what a repeated prompt prefix costs once the provider has stored it.
| Fact | Claude Fable 5.2 | Gemini 4 Carbon |
|---|---|---|
| Maker | Anthropic | |
| Tier | Flagships | Flagships |
| Input, per M tokens | $8.00 | $2.00 |
| Output, per M tokens | $40.00 | $10.00 |
| Cached input | $0.20 | $0.10 |
| Context window | 1M | 1.05M |
| Released | 9 Nov 2026 | 10 Nov 2026 |
| Weights | Closed weights | Closed weights |
What a job costs on each
1,000 runs of each job at the two list prices. The gap moves from job to job because the models price input, output and cached context differently.
| Job | Claude Fable 5.2 | Gemini 4 Carbon | Cheaper |
|---|---|---|---|
| Support reply3,000 in, 400 out. | $40.00 | $10.00 | Gemini 4 Carbon, 75% less |
| Document summary25,000 in, 1,000 out. | $240 | $60.00 | Gemini 4 Carbon, 75% less |
| Agent task80,000 in (70,000 cached), 3,000 out. | $214 | $57.00 | Gemini 4 Carbon, 73% less |
The token counts are ours, chosen to look like real work; the prices are the makers’. A model with no published cache price bills the agent task’s repeated context at its full input rate.
The small print
What each base rate leaves out, from the makers’ own pages: surcharges, discounts, promotions and cache pricing.
- Claude Fable 5.2
- Cache read is 0.025x input on this model ($0.20). Cache write $10 (5 min) or $16 (1 h). Fast mode $16 / $80. Batch API 50% off. US-only inference bills 1.1x. Full context window billed at standard rates. Max output 128K. Anthropic’s pricing page
- Gemini 4 Carbon
- Launch price through 2026-11-30; from 2026-12-01 it becomes $4 / $20, cached $0.20. Output includes thinking tokens. Implicit caching only. No long-context premium. Batch and Flex 50% off; Priority $3.60 / $18. Not on the Free tier. Max output 65,536, or up to 1,048,576 with long decode. Google’s pricing page
Other comparisons
Every head to head on the list that involves Claude Fable 5.2 or Gemini 4 Carbon.
Run Claude Fable 5.2 up to 60% below list price
AIGROW API credit covers Claude Fable 5.2 at published rates never above the list prices here, and $25 buys $100 of credit.
Prices checked 12 November 2026