Muse Spark 1.3 vs GPT-6 Astra
GPT-6 Astra comes out ahead on 8 of 14 shared measures, and the two rank 5 and 7 of 51 overall. Muse Spark 1.3 is 10× cheaper per million tokens (blended) — A$5.30 vs A$49.14 per 1,000 replies of customer support replys.
Where each one wins.
Muse Spark 1.3 ranks 5th of 51; GPT-6 Astra ranks 7th.
GPT-6 Astra ranks 2nd of 42; Muse Spark 1.3 ranks 6th.
GPT-6 Astra ranks 2nd of 41; Muse Spark 1.3 ranks 5th.
GPT-6 Astra ranks 3rd of 51; Muse Spark 1.3 ranks 6th.
Muse Spark 1.3 ranks 15th of 51; GPT-6 Astra ranks 23rd.
Muse Spark 1.3 ranks 6th of 50; GPT-6 Astra ranks 23rd.
Muse Spark 1.3 is 10× cheaper per million tokens (blended) — A$5.30 vs A$49.14 per 1,000 replies of customer support replys.
Muse Spark 1.3 writes 4.6× faster (248 tok/s vs 54 tok/s).
Both can be used from Australia through their makers’ own APIs (Meta and OpenAI), which may process requests outside Australia. None of the major cloud platforms offer it in an Australian region yet. GPT-6 Astra can be called from AWS Bedrock in Sydney and Microsoft Azure in Australia East, but only through global routing, so requests may be processed outside Australia.
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 | MUSE SPARK 1.3 | GPT-6 ASTRA | LEADS |
|---|---|---|---|
| AA Intelligence Index | 48.1 | 52.7 | GPT-6 Astra |
| AA Coding Index | 75.8 | 76.9 | GPT-6 Astra |
| GPQA Diamond | 93.5% | 96.1% | GPT-6 Astra |
| Humanity’s Last Exam | 48.7% | 54.7% | GPT-6 Astra |
| AA-LCR | 83.0% | 80.7% | Muse Spark 1.3 |
| Terminal-Bench 2.1 | 84.3% | 88.4% | GPT-6 Astra |
| τ²-Bench (banking) | 50.5% | 41.4% | Muse Spark 1.3 |
| SciCode | 58.8% | 56.5% | Muse Spark 1.3 |
| LMArena Text | 1493 | 1480 | Level |
| LMArena WebDev | 1657 | 1793 | GPT-6 Astra |
| LMArena Vision | 1294 | 1284 | Level |
| LMArena Document | 1468 | 1473 | Level |
| LMArena Agent | #15 | #2 | GPT-6 Astra |
| Blended price (AUD) | A$2.81 | A$28.08 | Muse Spark 1.3 |
| Output speed | 248 tok/s | 54 tok/s | Muse Spark 1.3 |
| Answer starts after | 35 s | 3.4 min | Muse Spark 1.3 |
| Context window | 1,048,576 tokens | 1,050,000 tokens | GPT-6 Astra |
| USE FROM AUSTRALIA | |||
| Maker’s API | YES | YES | |
| Processed in Australia | NO | NO | |
| AUSTRALIAN CLOUD REGIONS | |||
| AWS Bedrock · Sydney | NOT OFFERED | GLOBAL | |
| AWS Bedrock · Melbourne | NOT OFFERED | NOT IN AU | |
| Azure · Australia East | NOT OFFERED | GLOBAL | |
| Google Vertex AI · Sydney | NOT OFFERED | NOT OFFERED | |
The same jobs, in Australian dollars.
List prices at the snapshot’s RBA rate, excluding GST and reasoning tokens.
| JOB | MUSE SPARK 1.3 | GPT-6 ASTRA | MEDIAN MODEL |
|---|---|---|---|
| Customer support replyPER 1,000 REPLIES | A$5.30 | A$49.14 | ≈ A$6.58 |
| Summarise a 30-page documentPER 100 DOCUMENTS | A$3.99 | A$33.69 | ≈ A$4.74 |
| Agentic coding taskPER 10 TASKS | A$3.11 | A$26.67 | ≈ A$3.72 |
Each model in full.
Muse Spark 1.3 or GPT-6 Astra?
Is Muse Spark 1.3 better than GPT-6 Astra?
On our overall leaderboard Muse Spark 1.3 ranks 5th and GPT-6 Astra 7th of 51. Which is better depends on the job: the table above compares each benchmark, price and Australian availability.
Which is cheaper, Muse Spark 1.3 or GPT-6 Astra?
Muse Spark 1.3, at A$2.81 per million tokens (blended) against A$28.08 for GPT-6 Astra. Reasoning-heavy settings add output tokens, so real bills depend on the effort level you run.
Can I use Muse Spark 1.3 and GPT-6 Astra in Australia?
Both can be used from Australia through their makers’ own APIs (Meta and OpenAI), which may process requests outside Australia. None of the major cloud platforms offer it in an Australian region yet. GPT-6 Astra can be called from AWS Bedrock in Sydney and Microsoft Azure in Australia East, but only through global routing, so requests may be processed outside Australia.
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 →