Claude Opus 5 vs Claude Sonnet 5
Claude Opus 5 comes out ahead on 12 of 14 shared measures, and the two rank 4 and 37 of 51 overall. Claude Sonnet 5 is 2.5× cheaper per million tokens (blended) — A$9.83 vs A$24.57 per 1,000 replies of customer support replys.
Where each one wins.
Claude Opus 5 ranks 4th of 51; Claude Sonnet 5 ranks 37th.
Claude Opus 5 ranks 3rd of 42; Claude Sonnet 5 ranks 22nd.
Claude Opus 5 ranks 3rd of 41; Claude Sonnet 5 ranks 19th.
Claude Opus 5 ranks 4th of 51; Claude Sonnet 5 ranks 27th.
Claude Sonnet 5 ranks 14th of 51; Claude Opus 5 ranks 19th.
Claude Opus 5 ranks 18th of 50; Claude Sonnet 5 ranks 33rd.
Claude Sonnet 5 is 2.5× cheaper per million tokens (blended) — A$9.83 vs A$24.57 per 1,000 replies of customer support replys.
Claude Sonnet 5 writes 1.4× faster (73 tok/s vs 51 tok/s).
Both can be used from Australia through Anthropic’s own API, which may process requests outside Australia. Claude Opus 5 can run with requests kept in Australia on AWS Bedrock in Sydney and Melbourne. Claude Sonnet 5 can run with requests kept in Australia on AWS Bedrock in 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 OPUS 5 | CLAUDE SONNET 5 | LEADS |
|---|---|---|---|
| AA Intelligence Index | 50.8 | 38.2 | Claude Opus 5 |
| AA Coding Index | 78.0 | 71.5 | Claude Opus 5 |
| GPQA Diamond | 93.2% | 91.1% | Claude Opus 5 |
| Humanity’s Last Exam | 54.9% | 41.3% | Claude Opus 5 |
| AA-LCR | 79.3% | 82.0% | Claude Sonnet 5 |
| Terminal-Bench 2.1 | 89.1% | 80.5% | Claude Opus 5 |
| τ²-Bench (banking) | 42.1% | 37.3% | Claude Opus 5 |
| SciCode | 56.4% | 54.3% | Claude Opus 5 |
| LMArena Text | 1493 | 1461 | Claude Opus 5 |
| LMArena WebDev | 1691 | 1538 | Claude Opus 5 |
| LMArena Vision | 1289 | 1266 | Claude Opus 5 |
| LMArena Document | 1490 | 1476 | Level |
| LMArena Search | 1196 | ||
| LMArena Agent | #3 | #9 | Claude Opus 5 |
| Blended price (AUD) | A$14.04 | A$5.62 | Claude Sonnet 5 |
| Output speed | 51 tok/s | 73 tok/s | Claude Sonnet 5 |
| Answer starts after | 34 s | 1.4 min | 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 | YES · CLOUD | YES · CLOUD | |
| AUSTRALIAN CLOUD REGIONS | |||
| AWS Bedrock · Sydney | AU ROUTING | GLOBAL | |
| AWS Bedrock · Melbourne | IN REGION | 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 OPUS 5 | CLAUDE SONNET 5 | MEDIAN MODEL |
|---|---|---|---|
| Customer support replyPER 1,000 REPLIES | A$24.57 | A$9.83 | ≈ A$6.58 |
| Summarise a 30-page documentPER 100 DOCUMENTS | A$16.85 | A$6.74 | ≈ A$4.74 |
| Agentic coding taskPER 10 TASKS | A$13.34 | A$5.33 | ≈ A$3.72 |
Each model in full.
Claude Opus 5 or Claude Sonnet 5?
Is Claude Opus 5 better than Claude Sonnet 5?
On our overall leaderboard Claude Opus 5 ranks 4th and Claude Sonnet 5 37th of 51. Which is better depends on the job: the table above compares each benchmark, price and Australian availability.
Which is cheaper, Claude Opus 5 or Claude Sonnet 5?
Claude Sonnet 5, at A$5.62 per million tokens (blended) against A$14.04 for Claude Opus 5. Reasoning-heavy settings add output tokens, so real bills depend on the effort level you run.
Can I use Claude Opus 5 and Claude Sonnet 5 in Australia?
Both can be used from Australia through Anthropic’s own API, which may process requests outside Australia. Claude Opus 5 can run with requests kept in Australia on AWS Bedrock in Sydney and Melbourne. Claude Sonnet 5 can run with requests kept in Australia on AWS Bedrock in 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 →