GPT-6 Astra Pro vs Fugu Ultra
Fugu Ultra costs 1.7x less per output token than GPT-6 Astra Pro ($30.00 vs $50.00 per million). Updated October 23, 2026; no benchmark has tested both models yet.
- Coding
- No data
- Overall
- No data
- Output $/M
- $50.00
- Coding
- No data
- Overall
- No data
- Output $/M
- $30.00
GPT-6 Astra Pro or Fugu Ultra: which to pick
Neither model has a coding score yet, so the two cannot be ranked on coding.
Pick GPT-6 Astra Pro for a larger context window (1.05M against 1M tokens).
No benchmark has tested both yet. GPT-6 Astra Pro has results on WeirdML and Chess puzzles; Fugu Ultra has none yet. Compare them on price and context instead.
Which one for your work
Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.
Coding
Vibe Coding Index, six public coding benchmarks
No call
Neither has a coding score yet.
One side not measured
Long documents
Listed context window
GPT-6 Astra Pro
GPT-6 Astra Pro takes 1.05M tokens against 1M.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Fugu Ultra
GPT-6 Astra Pro $0.035, Fugu Ultra $0.020 per turn.
List prices
At a glance
- Coding index
- GPT-6 Astra Pro not benchmarked, Fugu Ultra not benchmarked.
- Widest category
- None yet: no category has been tested on both models.
- Widest single gap
- None yet: no benchmark has tested both models.
- Output price
- GPT-6 Astra Pro $50.00 against Fugu Ultra $30.00 per million output tokens, 1.7x apart.
- Context window
- GPT-6 Astra Pro takes 1.05M tokens, Fugu Ultra 1M.
Benchmark by benchmark
Every board either model has a result on, a category to a fold; bars are each result on a 0 to 100 scale. Only one model is measured on each, so no row names a leader.
CodingDirectional onlySix of these boards feed the Vibe Coding Index1 board measured
| Benchmark | GPT-6 Astra Pro | Fugu Ultra | Leader |
|---|---|---|---|
| WeirdML | 93.6% | Not measured | Only GPT-6 Astra Pro measured |
| Neither model has a result on the other 42 boards here | |||
ReasoningDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
| Benchmark | GPT-6 Astra Pro | Fugu Ultra | Leader |
|---|---|---|---|
| Chess puzzles | 76.0% | Not measured | Only GPT-6 Astra Pro measured |
| Neither model has a result on the other 22 boards here | |||
What each workload costs
Three fixed token mixes at each model's listed price, so per-token rates become a bill.
Chat turn
1K input + 500 output tokens
Fugu Ultra costs less
Repository review
50K input + 3K output tokens
Fugu Ultra costs less
Agent loop
200K input + 10K output tokens
Fugu Ultra costs less
Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.
Specification differences
The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.
| Specification | OpenAI GPT-6 Astra Pro | Sakana Fugu Ultra |
|---|---|---|
| Maker | OpenAI | Sakana |
| Weights | No public weights listed | No public weights listed |
| Released | September 4, 2026 | June 24, 2026 |
| Context window | 1.05M | 1M |
| Input $/Mtok | $10.00 | $5.00 |
| Output $/Mtok | $50.00 | $30.00 |
| Coding index | Not benchmarked | Not benchmarked |
| Independent measurements behind it | 0 | 0 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is GPT-6 Astra Pro better than Fugu Ultra for coding?
Neither model has a coding score yet, so the two cannot be ranked on coding. Pick GPT-6 Astra Pro for a larger context window (1.05M against 1M tokens).
Which is cheaper, GPT-6 Astra Pro or Fugu Ultra?
GPT-6 Astra Pro costs $10.00 per million input tokens and $50.00 per million output tokens; Fugu Ultra costs $5.00 and $30.00. Cost per solved task is known for neither of them.
Which has the bigger context window, GPT-6 Astra Pro or Fugu Ultra?
GPT-6 Astra Pro, with 1.05M tokens against 1M.
Has any benchmark tested both GPT-6 Astra Pro and Fugu Ultra?
No benchmark has tested both yet. GPT-6 Astra Pro has results on WeirdML and Chess puzzles; Fugu Ultra has none yet. Compare them on price and context instead. Data as of October 23, 2026.