Coding
Like-for-like- BTL-4
- 78.4
- Claude Haiku 4.5
- 73.3
- Weighted basis
- 1 vs 1 rows
- Reading
- BTL-4 leads
Model comparison
BTL-4 vs Claude Haiku 4.5
Updated August 11, 2026. Public scores include evidence status and uncertainty. They are not guarantees for a specific workload.
At least one model is not scored in the current public ranking lane, so the page does not name an overall quality winner.
1 results are shared. Category rows based on different benchmark sets are marked directional and do not name a winner.
Which one for your work
Recommendations appear only when a shared evidence basis or an explicit operating constraint supports the call. Secondary and unsupported use cases stay disclosed below the initial list.
Coding work
Code generation, repair, and software-engineering tasks
BTL-4
BTL-4 leads on the same 1 weighted benchmark row.
Confidence: limited
Long documents
Prompts that approach the documented context limit
BTL-4
BTL-4 has the larger documented context window.
Confidence: documented
Show secondary and unsupported calls
Agentic work
Tool use, computer use, and multi-step task completion
Not enough matched evidence
No shared weighted benchmark basis supports a winner.
Confidence: limited
Chat turn cost
1K fresh input + 500 output tokens
Not enough matched evidence
A complete comparable API-rate estimate is not available for both models.
Confidence: listed-rates
Cache-heavy agent loop cost
200K cached + 20K fresh input + 10K output tokens
Not enough matched evidence
The page does not recommend a cost winner because at least one model cannot fit the stated workload in one request. Claude Haiku 4.5 does not fit this workload in one request. BTL-4 has no comparable published API token rate.
Confidence: listed-rates
Repository review cost
50K fresh input + 3K output tokens
Not enough matched evidence
A complete comparable API-rate estimate is not available for both models.
Confidence: listed-rates
What is actually comparable
Shared results can support a head-to-head reading. Results present for only one model describe coverage, not superiority.
2 BTL-4 only
1 Shared
4 Claude Haiku 4.5 only
- Shared results
- 1
- BTL-4 only
- 2
- Claude Haiku 4.5 only
- 4
- Like-for-like categories
- 1 / 8
Category results, on a stated basis
Each row states whether both averages use the same weighted benchmark set. Directional and not-comparable rows remain visible, but they never receive a winner in this template.
Agentic
Not comparable- BTL-4
- Not measured
- Claude Haiku 4.5
- Not measured
- Weighted basis
- 0 vs 0 rows
- Reading
- Not comparable
Reasoning
Not comparable- BTL-4
- Not measured
- Claude Haiku 4.5
- Not measured
- Weighted basis
- 0 vs 0 rows
- Reading
- Not comparable
Knowledge
Not comparable- BTL-4
- Not measured
- Claude Haiku 4.5
- Not measured
- Weighted basis
- 0 vs 0 rows
- Reading
- Not comparable
Math
Not comparable- BTL-4
- Not measured
- Claude Haiku 4.5
- 4.9
- Weighted basis
- 0 vs 2 rows
- Reading
- Not comparable
Multilingual
Not comparable- BTL-4
- Not measured
- Claude Haiku 4.5
- Not measured
- Weighted basis
- 0 vs 0 rows
- Reading
- Not comparable
Multimodal
Not comparable- BTL-4
- Not measured
- Claude Haiku 4.5
- Not measured
- Weighted basis
- 0 vs 0 rows
- Reading
- Not comparable
Instruction following
Not comparable- BTL-4
- Not measured
- Claude Haiku 4.5
- Not measured
- Weighted basis
- 0 vs 0 rows
- Reading
- Not comparable
| Category | BTL-4 | Claude Haiku 4.5 | Weighted basis | Reading |
|---|---|---|---|---|
| Coding | 78.4 | 73.3 | Like-for-like1 vs 1 rows | BTL-4 leads |
| Agentic | Not measured | Not measured | Not comparable0 vs 0 rows | Not comparable |
| Reasoning | Not measured | Not measured | Not comparable0 vs 0 rows | Not comparable |
| Knowledge | Not measured | Not measured | Not comparable0 vs 0 rows | Not comparable |
| Math | Not measured | 4.9 | Not comparable0 vs 2 rows | Not comparable |
| Multilingual | Not measured | Not measured | Not comparable0 vs 0 rows | Not comparable |
| Multimodal | Not measured | Not measured | Not comparable0 vs 0 rows | Not comparable |
| Instruction following | Not measured | Not measured | Not comparable0 vs 0 rows | Not comparable |
Shape of the matched evidence
Only shared public evidence is shown. Sparse evidence stays a ruled list rather than being closed into a radar shape.
Too few matched category axes support a radar. The ruled list below shows only shared benchmark results; positions use each benchmark’s normalized display scale when available.
SWE-bench Verified
Coding
What each workload costs
Three fixed token mixes turn per-token rates into comparable decisions. Each scenario states context fit and whether cached input had to fall back to the published list-input rate.
Chat turn
1K fresh input + 500 output tokens
- BTL-4
- Self-hosted; infrastructure cost varies
- Fits in one request
- Claude Haiku 4.5
- $0.0035
- Fits in one request
BTL-4 has no comparable published API token rate.
Repository review
50K fresh input + 3K output tokens
- BTL-4
- Self-hosted; infrastructure cost varies
- Fits in one request
- Claude Haiku 4.5
- $0.065
- Fits in one request
BTL-4 has no comparable published API token rate.
Cache-heavy agent loop
200K cached + 20K fresh input + 10K output tokens
- BTL-4
- Self-hosted; infrastructure cost varies
- Fits in one request
- Cached-input rate unavailable
- Claude Haiku 4.5
- $0.09
- Does not fit in one request
Claude Haiku 4.5 does not fit this workload in one request. BTL-4 has no comparable published API token rate.
Specification differences
Sourced differences are shown directly. Missing facts stay explicit instead of being inferred from a model name or family.
SpecificationBTL-4Claude Haiku 4.5
Context window
Maximum documented context; output-token limits may be lower.
BTL-4
Claude Haiku 4.5
API model ID
BTL-4
Not sourced
Claude Haiku 4.5
claude-haiku-4-5-20251001
Claude API pricingCached-input rate
A missing cached-input rate falls back to the listed input rate only in the stated workload estimate.
BTL-4
No comparable hosted API rate
Bad Theory Labs BTL-4 model cardClaude Haiku 4.5
$0.1 per 1M cached input tokens
Claude API pricingDocumented inputs
BTL-4
Not sourced
Claude Haiku 4.5
Not sourced
Documented outputs
BTL-4
Not sourced
Claude Haiku 4.5
Not sourced
Provider availability
BTL-4
Not sourced
Claude Haiku 4.5
Not sourced
Reasoning profile
BTL-4
Reasoning
Claude Haiku 4.5
Non-Reasoning
Weight access
BTL-4
Open Weight
Claude Haiku 4.5
Proprietary
License
BTL-4
Open Weight
Claude Haiku 4.5
Proprietary
Release date
BTL-4
2026-08-05
Claude Haiku 4.5
2025-10-15
If you already use one of these models
- Deployment change
- The models list different providers, so authentication, endpoint behavior, limits, and feature support may change.
- Quality signal
- At least one model is not scored in the current public ranking lane, so the page does not name an overall quality winner.
- Workload cost
- A complete comparable API-rate estimate is not available for both models.
- Context tradeoff
- BTL-4 has the larger documented window (262K).
Run the same representative tasks against both endpoints before changing production traffic.
Benchmark evidence
The full public result ledger is available for audit without forcing a wide desktop table onto a phone.
Browse raw public benchmark evidence7 rows
Agentic
Coding
Math
Frequently asked questions
Which is better, BTL-4 or Claude Haiku 4.5?
At least one model is not scored in the current public ranking lane, so the page does not name an overall quality winner. The page therefore keeps the decision tied to the specific documented workload.
Which is better for coding, BTL-4 or Claude Haiku 4.5?
BTL-4 leads the like-for-like coding comparison across 1 shared weighted benchmark row.
Which is better for agentic tasks, BTL-4 or Claude Haiku 4.5?
The published evidence does not provide a shared weighted agentic tasks basis for both models, so BenchLM does not name a agentic tasks winner.
Which costs less, BTL-4 or Claude Haiku 4.5?
Both models do not have comparable published API token rates, so this page does not name a universal price winner.
Which has the larger context window, BTL-4 or Claude Haiku 4.5?
BTL-4 has the larger documented context window: 262K, compared with 200K.
Related comparisons
Last updated August 11, 2026
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