text model comparison
Claude Haiku 5.5 vs Solar Pro 4
Claude Haiku 5.5 and Solar Pro 4 are both current text models, from Anthropic and Upstage. Claude Haiku 5.5 is 67% cheaper per 1M input tokens than Solar Pro 4, $0.10 vs $0.30. On Arena Text, Claude Haiku 5.5 scores 1425 Elo and Solar Pro 4 1388 Elo (Arena, measured October 28, 2026). Claude Haiku 5.5 has the larger context window, 1,000,000 vs 512,000 tokens.
- Higher Arena Text
- Claude Haiku 5.51425 Elo against 1388 Elo
- Lower price per 1M input tokens
- Claude Haiku 5.5$0.10 against $0.30
- Longer context window
- Claude Haiku 5.51M tokens against 512K tokens
- Newer release
- Claude Haiku 5.5Oct 2026 against Aug 2026
Data verified November 3, 2026 · Dataset 2026-11-03
Side by side
Claude Haiku 5.5 and Solar Pro 4, line by line
Prices in effect today, compared at the same tier wherever both list one. The better value in each row is highlighted.
| Fact | Claude Haiku 5.5 | Solar Pro 4 |
|---|---|---|
| Price | ||
| Price per 1M input tokens | $0.10 (better) | $0.30 |
| Price per 1M output tokens | $0.50 (better) | $1.20 |
| Independent benchmarks | ||
| Arena Text | 1425 Elo (#41 of 51) (better) | 1388 Elo (#47 of 51) |
| Arena WebDev | 1589 Elo (#24 of 45) (better) | 1370 Elo (#43 of 45) |
| FrontierMath Tiers 1-3 (v2) | 75.1% (#19 of 42) | Not measured |
| GPQA Diamond | 89.6% (#30 of 41) | Not measured |
| SimpleQA Verified | 23.8% (#35 of 38) | Not measured |
| Specs | ||
| Provider | Anthropic | Upstage |
| Release date | October 7, 2026 | August 6, 2026 |
| Access | API only | API only |
| Context window | 1,000,000 tokens | 512,000 tokens |
| Max output | 128,000 tokens | 128,000 tokens |
| Input | text, image | text |
| Output | text | text |
Charts
Against every current text model
Where Claude Haiku 5.5 and Solar Pro 4 land among the current models of their task, on every independent benchmark, on price and on context.
Where each stands
On Arena Text, Claude Haiku 5.5 ranks #41 and Solar Pro 4 #47 of 51 current models. Each bar is the share of current models it beats: on score, price and context.
Independent benchmarks
Arena Text
Claude Haiku 5.5:#41of 51
1,425 Elo · ahead of 18%
Solar Pro 4:#47of 51
1,388 Elo · ahead of 8%
Arena WebDev
Claude Haiku 5.5:#24of 45
1,589 Elo · ahead of 48%
Solar Pro 4:#43of 45
1,370 Elo · ahead of 5%
FrontierMath Tiers 1-3 (v2)
Claude Haiku 5.5:#19of 42
75.1% · ahead of 56%
Solar Pro 4: Not scored
GPQA Diamond
Claude Haiku 5.5:#30of 41
89.6% · ahead of 28%
Solar Pro 4: Not scored
SimpleQA Verified
Claude Haiku 5.5:#35of 38
23.8% · ahead of 8%
Solar Pro 4: Not scored
Price and context
Price per 1M input tokens
Claude Haiku 5.5:#1of 52
$0.10 · cheaper than 96%
Solar Pro 4:#11of 52
$0.30 · cheaper than 75%
Price per 1M output tokens
Claude Haiku 5.5:#3of 52
$0.50 · cheaper than 92%
Solar Pro 4:#10of 52
$1.20 · cheaper than 76%
Context window
Claude Haiku 5.5:#26of 64
1M tokens · longer than 22%
Solar Pro 4:#51of 64
512K tokens · longer than 21%
Quality against price
Claude Haiku 5.5 scores 1,425 at $0.2; Solar Pro 4 scores 1,388 at $0.525 (blended price per 1M tokens). The line joins the current models no other beats on both price and Arena Text score; hover any point to name it.
Quality against price: the data
| Model | Provider | Blended price per 1M tokens | Arena Text (Elo) |
|---|---|---|---|
| Gemini 4 Argon | $4 | 1,520 | |
| Claude Opus 5.5 | Anthropic | $8 | 1,509 |
| Muse Wonder | Meta | $8 | 1,507 |
| Claude Fable 5 | Anthropic | $20 | 1,504 |
| Claude Fable 5.1 | Anthropic | $20 | 1,504 |
| Gemini 3.8 Flash | $1.50 | 1,496 | |
| Muse Spark 1.3 | Meta | $2 | 1,495 |
| Claude Opus 5 | Anthropic | $10 | 1,492 |
| Kimi K3 | Moonshot Kimi | $6 | 1,488 |
| GPT-5.6 Sol | OpenAI | $8 | 1,485 |
| Gemini 3.6 Flash | $3 | 1,483 | |
| GPT-5.5 | OpenAI | $11 | 1,482 |
| Claude Opus 4.8 | Anthropic | $10 | 1,482 |
| Qwen3.8-Max | Alibaba Qwen | $3 | 1,482 |
| GPT-6.1 Sol | OpenAI | $4 | 1,481 |
| GLM-5.3 | Z.ai | $2.15 | 1,481 |
| MiMo-V2.6-Pro | Xiaomi MiMo | $0.54 | 1,480 |
| Claude Sonnet 5.5 | Anthropic | $4 | 1,477 |
| GLM-5.3-Flash | Z.ai | $0.24 | 1,477 |
| GPT-6 Astra | OpenAI | $20 | 1,476 |
| DeepSeek-V4.1-Flash | DeepSeek | $0.52 | 1,476 |
| GPT-5.4 | OpenAI | $5.63 | 1,475 |
| Gemini 3 Flash Preview | $1.13 | 1,473 | |
| Grok 4.20 | xAI | $1.56 | 1,472 |
| GPT-5.6 Terra | OpenAI | $4.50 | 1,467 |
| Grok 4.5 | xAI | $3 | 1,465 |
| DeepSeek-V4-Pro | DeepSeek | $1.98 | 1,465 |
| Claude Sonnet 5 | Anthropic | $4 | 1,462 |
| GPT-6 Sol | OpenAI | $4 | 1,458 |
| Gemini 3.5 Flash-Lite | $0.85 | 1,456 | |
| Grok 4.6 | xAI | $3 | 1,455 |
| GPT-5.6 Luna | OpenAI | $0.45 | 1,453 |
| MiMo-V2.6-Flash | Xiaomi MiMo | $0.18 | 1,448 |
| Step 5 Preview | StepFun | $1.43 | 1,448 |
| Grok 4.3 | xAI | $1.56 | 1,442 |
| GPT-6 Luna | OpenAI | $0.20 | 1,441 |
| Grok 4.7 | xAI | $3 | 1,441 |
| Mistral Large 4 | Mistral AI | $1.05 | 1,432 |
| Claude Haiku 5.5 | Anthropic | $0.20 | 1,425 |
| GPT-4.1 | OpenAI | $3.50 | 1,415 |
| Solar Pro 4 | Upstage | $0.52 | 1,388 |
| GPT-4.1 mini | OpenAI | $0.70 | 1,383 |
| GPT-4.1 nano | OpenAI | $0.18 | 1,322 |
Cost
What each costs
Example workloads at each provider's listed rates, then every other rate either one lists. The cheaper figure in each row is highlighted.
The same work, priced
For 10M input and 2M output tokens, Solar Pro 4 costs 2.7 times as much as Claude Haiku 5.5, at each provider's listed rates.
10M input and 2M output tokens
Solar Pro 4 costs 2.7× as much
- Claude Haiku 5.5
- $2
- Solar Pro 4
- $5.40
The same, with 9M of the input tokens cached
Solar Pro 4 costs 2.7× as much
- Claude Haiku 5.5
- $1.19
- Solar Pro 4
- $3.24
| Workload or rate | Claude Haiku 5.5 | Solar Pro 4 |
|---|---|---|
| Example workloads | ||
| 10M input and 2M output tokens | $2 (better) | $5.40 |
| The same, with 9M of the input tokens cached | $1.19 (better) | $3.24 |
| The same, through the batch API | $1 | Not listed |
| Other listed rates | ||
| 1M input tokens, cached | $0.01 (better) | $0.06 |
| 1M input tokens, 5-minute cache write | $0.125 | Not listed |
| 1M input tokens, 1-hour cache write | $0.20 | Not listed |
| 1M input tokens, batch | $0.05 | Not listed |
| 1M output tokens, batch | $0.25 | Not listed |
| 1M input tokens, prompts over 100K tokens | $0.50 | Not listed |
| 1M output tokens, prompts over 100K tokens | $2.50 | Not listed |
Your own bill will differ. These figures use list prices and example workloads. The AI Model Cost Audit reviews your real usage, shortlists models that score as well for each task for less, and estimates the savings.
Launch price $100, regular price $150
Verdict
When to choose each
Claude Haiku 5.5
Where it leads
- Lower input and output prices, $0.10 and $0.50 vs $0.30 and $1.20 per 1M tokens
- Higher Arena Text score, 1425 Elo vs 1388 Elo
- Higher Arena WebDev score, 1589 Elo vs 1370 Elo
- Larger context window 1,000,000 vs 512,000 tokens
- Accepts image input
- Cheaper cached input, $0.01 vs $0.06 per 1M tokens
- Batch pricing, $0.05 input and $0.25 output per 1M tokens
Best for
- High-volume classification, extraction and routing under the 100,000-token line
- Cost-sensitive fan-out steps where a frontier model is overkill
Watch out for
- Priced by prompt length, and it is a cliff rather than a taper: a request whose prompt passes 100,000 tokens is billed at $0.50 input and $2.50 output for the whole request, five times the short rate
- Cache reads and cache writes both count toward that 100,000-token measurement, so a large cached prefix can tip a request into the higher band on its own
- It is the only current Claude model whose 1M window is not priced uniformly; every other 4.6-and-later model bills a 900k request at the same rate as a 9k one
Solar Pro 4
Where it leads
No measured lead over Claude Haiku 5.5 in this data.
Best for
- Korean and Japanese enterprise workloads
- Multi-step agent work with tool calls
Watch out for
- A closed model: Upstage does not disclose its parameter count
- Several of its published benchmark figures are in-house evaluations
From benchmark to production
Building on Claude Haiku 5.5 or Solar Pro 4?
Public scores rarely hold on your own data. We test both models on your real tasks, then build the agent or pipeline around the one that wins.
AI Model Cost AuditLaunch price $100, regular price $150What the audit includes
FAQ
Claude Haiku 5.5 vs Solar Pro 4 FAQ
Which is cheaper, Claude Haiku 5.5 or Solar Pro 4?
Claude Haiku 5.5 is 67% cheaper per 1M input tokens than Solar Pro 4, $0.10 vs $0.30. For 10M input and 2M output tokens, Claude Haiku 5.5 costs $2 and Solar Pro 4 $5.40 at standard rates.
Which is cheaper with prompt caching, Claude Haiku 5.5 or Solar Pro 4?
Claude Haiku 5.5 charges $0.01 per 1M cached input tokens, 90% below its standard input rate, and Solar Pro 4 $0.06, 80% below. With 9M of 10M input tokens cached and 2M output tokens, Claude Haiku 5.5 costs $1.19 and Solar Pro 4 $3.24.
Which scores higher on independent benchmarks, Claude Haiku 5.5 or Solar Pro 4?
Claude Haiku 5.5 leads on Arena Text, 1425 Elo to 1388 Elo; Claude Haiku 5.5 leads on Arena WebDev, 1589 Elo to 1370 Elo. Scores are independent evaluations, not either vendor's launch figures.
Which has the larger context window, Claude Haiku 5.5 or Solar Pro 4?
Claude Haiku 5.5 has the larger context window, 1,000,000 vs 512,000 tokens. Both return up to 128,000 tokens per response.
How do Claude Haiku 5.5 and Solar Pro 4 differ in features?
Claude Haiku 5.5 takes text and image input; Solar Pro 4 takes text.
Further reading
More on Claude Haiku 5.5 and Solar Pro 4
Articles on Claude Haiku 5.5 and Solar Pro 4
- Claude Haiku 5.5 vs Haiku 4.5: What Changes When You UpgradeOctober 14, 2026
- Claude Haiku 5.5: Real Cost, Benchmarks and When to Use ItOctober 14, 2026
Related comparisons
- Claude Fable 5 vs Claude Haiku 5.5
- GPT-6 Luna vs Solar Pro 4
- Claude Haiku 5.5 vs Claude Opus 4.8
- DeepSeek-V4.1-Flash vs Solar Pro 4
- Claude Haiku 5.5 vs Claude Opus 5.5
- Muse Glimmer vs Solar Pro 4
- Claude Haiku 5.5 vs Claude Sonnet 5
- Gemini 3.5 Flash-Lite vs Solar Pro 4
- Claude Haiku 5.5 vs DeepSeek-V4.1-Flash
- Nemotron 3.5 Lightning vs Solar Pro 4
- Claude Haiku 5.5 vs Gemini 3 Flash Preview
- GPT-4.1 mini vs Solar Pro 4
Production evaluation
Choosing between Claude Haiku 5.5 and Solar Pro 4?
Public benchmarks narrow the shortlist. We run both on your own tasks, data and cost limits, then build the routing and review controls to run the winner in production.
- A head-to-head evaluation on your real workload
- Routing between models by cost and difficulty