Claude Fable 5.1 vs Claude Opus 5
Claude Fable 5.1 comes out ahead on 12 of 14 shared measures, and the two rank 3 and 4 of 51 overall. Claude Opus 5 is 2.0× cheaper per million tokens (blended) — A$24.57 vs A$49.14 per 1,000 replies of customer support replys.
Where each one wins.
Claude Fable 5.1 ranks 3rd of 51; Claude Opus 5 ranks 4th.
Claude Fable 5.1 ranks 1st of 42; Claude Opus 5 ranks 3rd.
Claude Fable 5.1 ranks 1st of 41; Claude Opus 5 ranks 3rd.
Claude Fable 5.1 ranks 2nd of 51; Claude Opus 5 ranks 4th.
Claude Fable 5.1 ranks 4th of 51; Claude Opus 5 ranks 19th.
Claude Opus 5 ranks 18th of 50; Claude Fable 5.1 ranks 20th.
Claude Opus 5 is 2.0× cheaper per million tokens (blended) — A$24.57 vs A$49.14 per 1,000 replies of customer support replys.
Claude Fable 5.1 writes 1.3× faster (65 tok/s vs 51 tok/s).
Both can be used from Australia through Anthropic’s own API, which may process requests outside Australia. Claude Fable 5.1 can be called from AWS Bedrock in Sydney and Melbourne and Google Vertex AI in Sydney, but only through global routing, so requests may be processed outside Australia. Claude Opus 5 can run with requests kept in Australia on AWS Bedrock in Sydney and Melbourne.
Side by side.
“Level” means the gap is inside LMArena’s confidence interval, or the scores are identical. Independent test scores are for each model’s headline setting. Both models can be used from Australia through their makers’ APIs; the Australian rows show whether requests can also be processed in Australia.
| BENCHMARK | CLAUDE FABLE 5.1 | CLAUDE OPUS 5 | LEADS |
|---|---|---|---|
| AA Intelligence Index | 53.4 | 50.8 | Claude Fable 5.1 |
| AA Coding Index | 81.6 | 78.0 | Claude Fable 5.1 |
| GPQA Diamond | 93.7% | 93.2% | Claude Fable 5.1 |
| Humanity’s Last Exam | 59.1% | 54.9% | Claude Fable 5.1 |
| AA-LCR | 85.3% | 79.3% | Claude Fable 5.1 |
| Terminal-Bench 2.1 | 91.4% | 89.1% | Claude Fable 5.1 |
| τ²-Bench (banking) | 47.2% | 42.1% | Claude Fable 5.1 |
| SciCode | 63.1% | 56.4% | Claude Fable 5.1 |
| LMArena Text | 1499 | 1493 | Level |
| LMArena WebDev | 1755 | 1691 | Claude Fable 5.1 |
| LMArena Vision | 1289 | 1289 | Level |
| LMArena Document | 1493 | 1490 | Level |
| LMArena Agent | #1 | #3 | Claude Fable 5.1 |
| Blended price (AUD) | A$28.08 | A$14.04 | Claude Opus 5 |
| Output speed | 65 tok/s | 51 tok/s | Claude Fable 5.1 |
| Answer starts after | 2.0 min | 34 s | Claude Opus 5 |
| Context window | 1,000,000 tokens | 1,000,000 tokens | Level |
| USE FROM AUSTRALIA | |||
| Maker’s API | YES | YES | |
| Processed in Australia | NO | YES · CLOUD | |
| AUSTRALIAN CLOUD REGIONS | |||
| AWS Bedrock · Sydney | GLOBAL | AU ROUTING | |
| AWS Bedrock · Melbourne | GLOBAL | IN REGION | |
| Azure · Australia East | NOT IN AU | NOT IN AU | |
| Google Vertex AI · Sydney | GLOBAL | GLOBAL | |
The same jobs, in Australian dollars.
List prices at the snapshot’s RBA rate, excluding GST and reasoning tokens.
| JOB | CLAUDE FABLE 5.1 | CLAUDE OPUS 5 | MEDIAN MODEL |
|---|---|---|---|
| Customer support replyPER 1,000 REPLIES | A$49.14 | A$24.57 | ≈ A$6.58 |
| Summarise a 30-page documentPER 100 DOCUMENTS | A$33.69 | A$16.85 | ≈ A$4.74 |
| Agentic coding taskPER 10 TASKS | A$26.67 | A$13.34 | ≈ A$3.72 |
Claude Fable 5.1 or Claude Opus 5?
Is Claude Fable 5.1 better than Claude Opus 5?
On our overall leaderboard Claude Fable 5.1 ranks 3rd and Claude Opus 5 4th of 51. Which is better depends on the job: the table above compares each benchmark, price and Australian availability.
Which is cheaper, Claude Fable 5.1 or Claude Opus 5?
Claude Opus 5, at A$14.04 per million tokens (blended) against A$28.08 for Claude Fable 5.1. Reasoning-heavy settings add output tokens, so real bills depend on the effort level you run.
Can I use Claude Fable 5.1 and Claude Opus 5 in Australia?
Both can be used from Australia through Anthropic’s own API, which may process requests outside Australia. Claude Fable 5.1 can be called from AWS Bedrock in Sydney and Melbourne and Google Vertex AI in Sydney, but only through global routing, so requests may be processed outside Australia. Claude Opus 5 can run with requests kept in Australia on AWS Bedrock in Sydney and Melbourne.
Ratings: LMArena leaderboard dataset (CC BY 4.0), rescaled for the lens scores · leaderboards to 22 Sep 2026
Evaluations, prices and speed: Artificial Analysis (artificialanalysis.ai) · fetched 23 Sep 2026
Exchange rate: Reserve Bank of Australia, table F11.1 · A$1 = US$0.7123 on 22 Sep 2026 · prices exclude GST
Snapshot 23 Sep 2026 · updated weekly · How the rankings work →