Claude Fable 5 vs GPT-5.6 Sol
Anthropic against OpenAI, costed on the same three workloads. GPT-5.6 Sol is cheaper on all three workloads.
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Monthly bill, side by side
| Workload | Claude Fable 5 | GPT-5.6 Sol | Difference |
|---|---|---|---|
| Support chatbot 2,500 six-turn conversations a day |
$40,275 | $16,110 | $24,165 (2.5×) |
| Document summarizer 1,000 single-shot summaries a day |
$4,860 | $1,944 | $2,916 (2.5×) |
| Coding agent 200 twelve-turn sessions a day |
$28,080 | $11,232 | $16,848 (2.5×) |
No prompt caching and no batch discount on either side, so the comparison is like for like. Both figures assume 30 days a month.
The rate cards
| Claude Fable 5 | GPT-5.6 Sol | |
|---|---|---|
| Input, per 1M tokens | $10 | $4 (Promotional rate until 2026-11-21 — standard rate $5/M) |
| Output, per 1M tokens | $50 | $20 (Promotional rate until 2026-11-21 — standard rate $30/M) |
| Cached input | $1 | $0.4 (Promotional rate until 2026-11-21 — standard rate $0.5/M) |
| Context window | 1M | 922K |
| Maximum output | 128K | 128K |
| Reasoning model | yes | yes |
| Vision | yes | yes |
Beyond the price
- Claude Fable 5 reads up to 1M tokens of context in one request; GPT-5.6 Sol stops at 922K.
Run this comparison on your own numbers
Full detail: Claude Fable 5 pricing · GPT-5.6 Sol pricing
More comparisons
Other head-to-heads that include Claude Fable 5 or GPT-5.6 Sol.
- Claude Fable 5 vs Gemini 4 Argon
- Claude Fable 5 vs GPT-5.5
- Claude Fable 5 vs Muse Wonder 1.0
- GPT-5.6 Sol vs Claude Opus 4.7
- GPT-5.6 Sol vs Claude Opus 4.8
- GPT-5.6 Sol vs Claude Opus 5.5
Common questions
Which is cheaper, Claude Fable 5 or GPT-5.6 Sol?
GPT-5.6 Sol is cheaper on all three workloads.
How much would Claude Fable 5 and GPT-5.6 Sol cost each month?
On PromptSpend's standard workloads, per month: support chatbot: Claude Fable 5 $40,275, GPT-5.6 Sol $16,110 (GPT-5.6 Sol is cheaper by $24,165); document summarizer: Claude Fable 5 $4,860, GPT-5.6 Sol $1,944 (GPT-5.6 Sol is cheaper by $2,916); coding agent: Claude Fable 5 $28,080, GPT-5.6 Sol $11,232 (GPT-5.6 Sol is cheaper by $16,848). No prompt caching and no batch discount is assumed.
How do Claude Fable 5 and GPT-5.6 Sol differ apart from price?
Claude Fable 5 reads up to 1M tokens of context in one request; GPT-5.6 Sol stops at 922K.