The AI arena is free today

Open Superagent

GPT-5 vs GPT-6 Sol

GPT-6 Sol leads the LLM Stats Score 49.4 to 33.8. GPT-5 is 1.2x cheaper per token.

OpenAI · OpenAI · Updated for 2026

Which is better?

GPT-6 Sol leads the overall LLM Stats Score 49.4 to 33.8, ranking #21 overall.

On price, GPT-5 is roughly 1.2x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

GPT-6 Sol also accepts a larger context window (1,050,000 input tokens), making it the stronger choice for long documents and large codebases.

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

Choose GPT-5

  • cost matters — it's about 1.2x cheaper per token

Choose GPT-6 Sol

  • overall performance matters — it scores 49.4 and ranks #21 on LLM Stats
  • your work emphasizes reasoning and agents — it leads those capability indexes
  • you process long inputs — it offers a 1,050,000 token context window
  • you want the most recent training data — it shipped Sep 2026

At a glance

The differences that matter most.

GPT-5
OpenAI
GPT-6 Sol
OpenAI
Core performance indexes
LLM Stats Score
33.8
#103
49.4
#21
Reasoning
34.2
#96
45.6
#29
Coding
26.4
#70
35.8
#25
Agents
9.1
#134
36.7
#15
Cost, coverage & limits
Benchmark wins
—
—
Input price
$1.25 / M
$2.00 / M
Output price
$10.00 / M
$10.00 / M
Context window
400,000
1,050,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
GPT-5
GPT-6 Sol
Tool use
16.2#84
26.6#25
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

34 reported for GPT-5 · 5 for GPT-6 Sol

No common benchmarks found

GPT-5 and GPT-6 Soldon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

GPT-5 costs less

For input processing, GPT-5 ($1.25/1M tokens) is 1.6x cheaper than GPT-6 Sol ($2.00/1M tokens).

For output processing, GPT-5 ($10.00/1M tokens) costs the same as GPT-6 Sol ($10.00/1M tokens).

In conclusion, GPT-6 Sol is more expensive than GPT-5.*

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

Lowest available price from all providers
Wed Sep 23 2026 • llm-stats.com
OpenAI
GPT-5
Input tokens$1.25
Output tokens$10.00
Best providerOpenAI
OpenAI
GPT-6 Sol
Input tokens$2.00
Output tokens$10.00
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-6 Sol accepts 1,050,000 input tokens compared to GPT-5's 400,000 tokens. Both models can generate responses up to 128,000 tokens.

OpenAI
GPT-5
Input400,000 tokens
Output128,000 tokens
OpenAI
GPT-6 Sol
Input1,050,000 tokens
Output128,000 tokens
Wed Sep 23 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both GPT-5 and GPT-6 Sol support multimodal inputs.

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

GPT-5

Text
Images
Audio
Video

GPT-6 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-5

Proprietary

Closed source

GPT-6 Sol

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-5 was released on 2025-08-07, while GPT-6 Sol was released on 2026-09-22.

GPT-6 Sol is 14 months newer than GPT-5.

GPT-5

Aug 7, 2025

1.1 years ago

GPT-6 Sol

Sep 22, 2026

0 days ago

1.1yr newer

Knowledge Cutoff

When training data ends

GPT-5 has a knowledge cutoff of 2024-09-30, while GPT-6 Sol has a cutoff of 2026-04-20.

GPT-6 Sol has more recent training data (up to 2026-04-20), making it potentially better informed about events through that date compared to GPT-5 (2024-09-30).

GPT-5

Sep 2024

GPT-6 Sol

Apr 2026

1.6 yr newer

Provider Availability

GPT-5 is available from OpenAI. GPT-6 Sol is available from OpenAI.

GPT-5

openai logo
OpenAI
Input Price:Input: $1.25/1MOutput Price:Output: $10.00/1M

GPT-6 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?Start an Issue discussion→

Judge for yourself.

Run your own prompts against GPT-5 and GPT-6 Sol side-by-side, then vote on the output you prefer.

GPT-5
✓ Preferred
GPT-6 Sol
Open in Playground

FAQ

Common questions about GPT-5 vs GPT-6 Sol.

Which is better, GPT-5 or GPT-6 Sol?

GPT-6 Sol leads the LLM Stats Score 49.4 to 33.8. GPT-5 is made by OpenAI and GPT-6 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-5 compare to GPT-6 Sol in benchmarks?

GPT-5 scores SWE-Lancer (IC-Diamond subset): 100.0%, COLLIE: 99.0%, Tau2 Telecom: 96.7%, OpenAI-MRCR: 2 needle 128k: 95.2%, AIME 2025: 94.6%. GPT-6 Sol scores DeepSWE 1.1: 68.8%, OSWorld 2.0: 64.4%, Agents' Last Exam: 56.4%, FrontierCode 1.1: 49.3%, AutomationBench v1.0.6: 33.2%.

Is GPT-5 cheaper than GPT-6 Sol?

GPT-5 is 1.6x cheaper for input tokens. GPT-5 costs $1.25/M input and $10.00/M output via openai. GPT-6 Sol costs $2.00/M input and $10.00/M output via openai.

What are the context window sizes for GPT-5 and GPT-6 Sol?

GPT-5 supports 400K tokens and GPT-6 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-5 and GPT-6 Sol?

Key differences include LLM Stats Score (33.8 vs 49.4), context window (400K vs 1.1M), input pricing ($1.25 vs $2.00/M). See the full comparison above for benchmark-by-benchmark results.

Related comparisons