Head-to-head · Anthropic vs OpenAI
Claude Haiku 4.5 vs GPT-6 Sol
Quick answer: Claude Haiku 4.5 stands out for cheapest way to use Claude at scale. GPT-6 Sol stands out for strong balance of quality and cost. Reviewed September 2026.
Overview
Claude Haiku 4.5: Claude Haiku 4.5 is Anthropic's fast, low-cost model at $1 and $5 per million tokens. It suits high-volume tasks such as classification, extraction and short drafting, where response speed and cost matter more than deep reasoning.
GPT-6 Sol: GPT-6 Sol, launched on 22 September 2026, brings GPT-6 Astra's technology to a faster, cheaper model at $2 and $10 per million tokens. OpenAI states these are permanent prices, not promotional rates.
At a glance
| Dimension | Claude Haiku 4.5 | GPT-6 Sol |
|---|---|---|
| Vendor | Anthropic | OpenAI |
| Starting price | API: $1 in / $5 out per M tokens | API: $2 in / $10 out per M tokens |
| Pricing model | Paid | Paid |
| Free tier | No | No |
| Category | Generative AI | Generative AI |
Strengths and limits
Claude Haiku 4.5
- Cheapest way to use Claude at scale
- Good quality for classification and extraction
- Low latency
Watch out for
- Weaker on long, multi-step reasoning
- Haiku 5.5 is announced as coming soon
- Less reliable on complex tool chains
GPT-6 Sol
- Strong balance of quality and cost
- Price is permanent, not introductory
- Good default for production workloads
Watch out for
- Below Astra on the hardest tasks
- Newest release with limited track record
- Competes closely with Claude Sonnet 5 on price
Key features
Claude Haiku 4.5
- Fast responses for interactive and high-volume use
- Lowest price in the current Claude lineup
- Tool use support
- Batch pricing at half the standard rate
GPT-6 Sol
- Built on GPT-6 Astra technology
- Permanent $2 and $10 per million token pricing
- Faster responses than Astra
- Available through the OpenAI API
Pricing compared
Claude Haiku 4.5 is priced by usage rather than by seat: API: $1 in / $5 out per M tokens. That means cost scales with how much text you send and receive, so estimate your monthly volume before committing.
GPT-6 Sol is priced by usage rather than by seat: API: $2 in / $10 out per M tokens. That means cost scales with how much text you send and receive, so estimate your monthly volume before committing.
Profession-fit verdict
8 roles where both tools are recommended. A higher relevance score means a better fit for that job.
| Profession | Claude Haiku 4.5 score | GPT-6 Sol score |
|---|---|---|
| Medical Coder | 7/10 | 8/10 |
| Insurance Agent | 7/10 | 8/10 |
| Auditor | 7/10 | 8/10 |
| Tax Preparer | 7/10 | 8/10 |
| Legal Secretary | 7/10 | 8/10 |
| IT Support | 7/10 | 8/10 |
| Recruiter | 7/10 | 8/10 |
| Customer Service Manager | 7/10 | 8/10 |
Frequently asked questions
Which is better, Claude Haiku 4.5 or GPT-6 Sol?
It depends on the work. Claude Haiku 4.5 stands out for cheapest way to use Claude at scale. GPT-6 Sol stands out for strong balance of quality and cost. Across 8 professions where both are rated, GPT-6 Sol ranks higher more often (8 roles).
How do Claude Haiku 4.5 and GPT-6 Sol compare on price?
Claude Haiku 4.5 is priced by usage rather than by seat: API: $1 in / $5 out per M tokens. That means cost scales with how much text you send and receive, so estimate your monthly volume before committing. GPT-6 Sol is priced by usage rather than by seat: API: $2 in / $10 out per M tokens. That means cost scales with how much text you send and receive, so estimate your monthly volume before committing.
Is there a free option between Claude Haiku 4.5 and GPT-6 Sol?
Neither lists a permanent free tier. Look for trials or usage-based pricing to test on real work first.