text model comparison
Claude Fable 5 vs GPT-5.6 Sol
Claude Fable 5 and GPT-5.6 Sol are both current text models, from Anthropic and OpenAI. GPT-5.6 Sol is 60% cheaper per 1M input tokens than Claude Fable 5, $4 vs $10. On Arena Text, Claude Fable 5 scores 1504 Elo and GPT-5.6 Sol 1485 Elo (Arena, measured October 8, 2026). GPT-5.6 Sol has the larger context window, 1,050,000 vs 1,000,000 tokens.
Data verified October 13, 2026 · Dataset 2026-10-13
Side by side
Prices in effect today, compared at the same tier wherever both list one. The better value in each row is highlighted.
| Fact | Claude Fable 5 | GPT-5.6 Sol |
|---|---|---|
| Price per 1M input tokens | $10 | $4 (better) |
| Price per 1M output tokens | $50 | $20 (better) |
| Arena Text | 1504 Elo (#3 of 49) (better) | 1485 Elo (#11 of 49) |
| GPQA Diamond | 85.9% (#33 of 40) | 93.5% (#11 of 40) (better) |
| FrontierMath Tiers 1-3 (v2) | 87% (#8 of 40) | 89.1% (#6 of 40) (better) |
| SimpleQA Verified | 70.7% (#6 of 36) (better) | 69.7% (#7 of 36) |
| Provider | Anthropic | OpenAI |
| Release date | June 9, 2026 | July 9, 2026 |
| Access | API only | API only |
| Context window | 1,000,000 tokens | 1,050,000 tokens |
| Max output | 128,000 tokens | 128,000 tokens |
| Input | text, image | text, image |
| Output | text | text |
What each costs
Example workloads at each provider's listed rates, then every other rate either one lists. The cheaper figure in each row is highlighted.
| Workload or rate | Claude Fable 5 | GPT-5.6 Sol |
|---|---|---|
| 10M input and 2M output tokens | $200 | $80 (better) |
| The same, with 9M of the input tokens cached | $119 | $47.60 (better) |
| Other listed rates | ||
| 1M input tokens, cached | $1 | $0.40 (better) |
When to choose each
Claude Fable 5
Where it leads
- Higher Arena Text score, 1504 Elo vs 1485 Elo
- Higher SimpleQA Verified score, 70.7% vs 69.7%
Best for
- Long-horizon coding, reasoning, and knowledge-work evaluations
Watch out for
- Fable requires 30-day data retention, and classifier-triggered requests fall back to Claude Opus 4.8
GPT-5.6 Sol
Where it leads
- Lower input and output prices, $4 and $20 vs $10 and $50 per 1M tokens
- Higher GPQA Diamond score, 93.5% vs 85.9%
- Higher FrontierMath Tiers 1-3 (v2) score, 89.1% vs 87%
- Larger context window 1,050,000 vs 1,000,000 tokens
- Cheaper cached input, $0.40 vs $1 per 1M tokens
Best for
- Frontier capability evaluations for complex API workflows
- Long-horizon coding and research agents that use computer use or MCP tools
Watch out for
- Not in the pinned LiveBench snapshot; its independent scores here come from Epoch AI's own GPQA Diamond, FrontierMath and SimpleQA Verified runs
Claude Fable 5 vs GPT-5.6 Sol FAQ
Which is cheaper, Claude Fable 5 or GPT-5.6 Sol?
GPT-5.6 Sol is 60% cheaper per 1M input tokens than Claude Fable 5, $4 vs $10. For 10M input and 2M output tokens, Claude Fable 5 costs $200 and GPT-5.6 Sol $80 at standard rates.
Which is cheaper with prompt caching, Claude Fable 5 or GPT-5.6 Sol?
Claude Fable 5 charges $1 per 1M cached input tokens, 90% below its standard input rate, and GPT-5.6 Sol $0.40, 90% below. With 9M of 10M input tokens cached and 2M output tokens, Claude Fable 5 costs $119 and GPT-5.6 Sol $47.60.
Which scores higher on independent benchmarks, Claude Fable 5 or GPT-5.6 Sol?
Claude Fable 5 leads on Arena Text, 1504 Elo to 1485 Elo; GPT-5.6 Sol leads on GPQA Diamond, 93.5% to 85.9%; GPT-5.6 Sol leads on FrontierMath Tiers 1-3 (v2), 89.1% to 87%. Scores are independent evaluations, not either vendor's launch figures.
Which has the larger context window, Claude Fable 5 or GPT-5.6 Sol?
GPT-5.6 Sol has the larger context window, 1,050,000 vs 1,000,000 tokens. Both return up to 128,000 tokens per response.
Articles on Claude Fable 5 and GPT-5.6 Sol
- Claude Fable 5 vs GPT 5.6: Benchmarks, Cost, Access, and Best Use CasesJuly 3, 2026 · compares both
- Claude Opus 5.5 Benchmarks: What the Chart Shows and HidesSeptember 23, 2026
- Fable 5.1 vs Opus 5 vs GPT-5.6: Which to UseSeptember 1, 2026
- Token Efficiency: OpenAI's Full-Stack BetAugust 25, 2026
- Kimi K3 vs Opus 5 vs GPT-5.6 Sol: which model should you use?July 31, 2026
- ChatGPT for Academic Researchers: GPT-5.6 Sol ProJuly 30, 2026
Related comparisons
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- Gemini 3.8 Flash vs GPT-5.6 Sol
- Claude Fable 5 vs Gemini 3.5 Flash
- Claude Opus 5 vs GPT-5.6 Sol
- Claude Fable 5 vs GPT-5.5
- GPT-5.6 Sol vs Kimi K3
- Claude Fable 5 vs Claude Fable 5.1
- Claude Opus 4.8 vs GPT-5.6 Sol
- Claude Fable 5 vs Gemini 4 Argon
- GPT-5.5 vs GPT-5.6 Sol
Production evaluation
Choosing between Claude Fable 5 and GPT-5.6 Sol?
Public benchmarks narrow the shortlist. We run both on your own tasks, data and cost limits, then build the routing and review controls to run the winner in production.
- A head-to-head evaluation on your real workload
- Routing between models by cost and difficulty