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GPT-6 Astra vs GPT-6.1 Sol

GPT-6 Astra leads the LLM Stats Score 59.1 to 52.0. GPT-6.1 Sol is 5.0x cheaper per token.

OpenAI · OpenAI · Updated for 2026

Which is better?

GPT-6 Astra leads the overall LLM Stats Score 59.1 to 52.0, ranking #2 overall.

The models split the 4 individual benchmarks reported for both models evenly.

On price, GPT-6.1 Sol is roughly 5.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose GPT-6 Astra

  • overall performance matters — it scores 59.1 and ranks #2 on LLM Stats
  • your work emphasizes reasoning — it leads those capability indexes

Choose GPT-6.1 Sol

  • cost matters — it's about 5.0x cheaper per token
  • you want the most recent training data — it shipped Sep 2026

At a glance

The differences that matter most.

GPT-6 Astra
OpenAI
GPT-6.1 Sol
OpenAI
Core performance indexes
LLM Stats Score
59.1
#2
52.0
#11
Reasoning
57.2
#2
42.2
#50
Coding
48.5
#3
38.4
#19
Agents
45.7
#1
38.1
#12
Cost, coverage & limits
Benchmark wins
2 of 4
2 of 4
Input price
$10.00 / M
$2.00 / M
Output price
$50.00 / M
$10.00 / M
Context window
1,050,000
1,050,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

3 shared
Index
GPT-6 Astra
GPT-6.1 Sol
Vision
39.8#4
31.6#26
Tool use
34.8#1
22.1#47
Multimodal
36.7#8
30.7#30
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

22 reported for GPT-6 Astra · 10 for GPT-6.1 Sol

4 shared

GPT-6 Astra outperforms in 2 benchmarks (OSWorld 2.0, Terminal-Bench-Science 0.1), while GPT-6.1 Sol is better at 2 benchmarks (DeepSWE 1.1, HealthBench Professional).

Both models are evenly matched across the benchmarks.

Wed Sep 30 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

GPT-6.1 Sol costs less

For input processing, GPT-6 Astra ($10.00/1M tokens) is 5.0x more expensive than GPT-6.1 Sol ($2.00/1M tokens).

For output processing, GPT-6 Astra ($50.00/1M tokens) is 5.0x more expensive than GPT-6.1 Sol ($10.00/1M tokens).

In conclusion, GPT-6 Astra is more expensive than GPT-6.1 Sol.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Wed Sep 30 2026 • llm-stats.com
OpenAI
GPT-6 Astra
Input tokens$10.00
Output tokens$50.00
Best providerOpenAI
OpenAI
GPT-6.1 Sol
Input tokens$2.00
Output tokens$10.00
Best providerOpenAI
Notice missing or incorrect data?

Context Window

Maximum input and output token capacity

Both models have the same input context window of 1,050,000 tokens. Both models can generate responses up to 128,000 tokens.

OpenAI
GPT-6 Astra
Input1,050,000 tokens
Output128,000 tokens
OpenAI
GPT-6.1 Sol
Input1,050,000 tokens
Output128,000 tokens
Wed Sep 30 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both GPT-6 Astra and GPT-6.1 Sol support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

GPT-6 Astra

Text
Images
Audio
Video

GPT-6.1 Sol

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

GPT-6 Astra

Proprietary

Closed source

GPT-6.1 Sol

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-6 Astra was released on 2026-09-04, while GPT-6.1 Sol was released on 2026-09-29.

GPT-6.1 Sol is 1 month newer than GPT-6 Astra.

GPT-6 Astra

Sep 4, 2026

3 weeks ago

GPT-6.1 Sol

Sep 29, 2026

0 days ago

3w newer

Knowledge Cutoff

When training data ends

Both models have the same knowledge cutoff date of 2026-04-30.

They should have similar awareness of historical events and information up to this date.

GPT-6 Astra

Apr 2026

GPT-6.1 Sol

Apr 2026

Provider Availability

GPT-6 Astra is available from OpenAI. GPT-6.1 Sol is available from OpenAI.

GPT-6 Astra

openai logo
OpenAI
Input Price:Input: $10.00/1MOutput Price:Output: $50.00/1M

GPT-6.1 Sol

openai logo
OpenAI
Input Price:Input: $2.00/1MOutput Price:Output: $10.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against GPT-6 Astra and GPT-6.1 Sol side-by-side, then vote on the output you prefer.

GPT-6 Astra
✓ Preferred
GPT-6.1 Sol
Open in Playground

FAQ

Common questions about GPT-6 Astra vs GPT-6.1 Sol.

Which is better, GPT-6 Astra or GPT-6.1 Sol?

GPT-6 Astra leads the LLM Stats Score 59.1 to 52.0. GPT-6 Astra is made by OpenAI and GPT-6.1 Sol is made by OpenAI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does GPT-6 Astra compare to GPT-6.1 Sol in benchmarks?

GPT-6 Astra scores ExploitBench: 100.0%, ARC-AGI-3: 99.9%, ARC-AGI: 98.5%, FrontierMath Tier 4 (v2): 97.6%, GPQA: 96.0%. GPT-6.1 Sol scores HealthBench Consensus: 96.0%, DeepSWE 1.1: 75.2%, OSWorld 2.0: 71.4%, HealthBench Professional: 64.2%, HealthBench: 58.5%.

Is GPT-6 Astra cheaper than GPT-6.1 Sol?

GPT-6.1 Sol is 5.0x cheaper for input tokens. GPT-6 Astra costs $10.00/M input and $50.00/M output via openai. GPT-6.1 Sol costs $2.00/M input and $10.00/M output via openai.

What are the context window sizes for GPT-6 Astra and GPT-6.1 Sol?

GPT-6 Astra supports 1.1M tokens and GPT-6.1 Sol supports 1.1M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between GPT-6 Astra and GPT-6.1 Sol?

Key differences include LLM Stats Score (59.1 vs 52.0), input pricing ($10.00 vs $2.00/M). See the full comparison above for benchmark-by-benchmark results.

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